Papers - AKIMUNE Hidetoshi
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Excitation of the isoscalar giant monopole resonance using Li6 inelastic scattering Reviewed International coauthorship
J. Arroyo, U. Garg, H. Akimune, G. P. A. Berg, D. C. Cuong, M. Fujiwara, M. N. Harakeh, M. Itoh, T. Kawabata, K. Kawase, J. T. Matta, D. Patel, M. Uchida, M. Yosoi
Physical Review C 2025.1
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Measurement of the Radiative-Decay Probability of the Hoyle State Reviewed International coauthorship
Kosuke Sakanashi, Takahiro Kawabata, Tatsuya Furuno, Atsushi Tamii, Rei Niina, Shintaro Okamoto, Masatoshi Ito, Satoshi Adachi, Hidetoshi Akimune, Yohei Matsuda, Shigeru Kubono, Soichiro Aogaki, Pär-Anders Soöderstroöm, Madgearu Teodora, Haridas Pai, Mihai Cuciuc, Dmitry Tescov, Ruxandra Borcea, Andrei Turturica, Constantin Mihai, Catalin Neacse
EPJ Web of Conferences 306 01047 - 01047 2024.10
Publisher：EDP Sciences
The radiative-decay probability of the Hoyle state is actually controversial because new data which contradicts the currently adopted value has been recently reported. In this work, we performed the new reliable measurement of the radiative-decay probability of the Hoyle state. We successfully obtained 40 triplecoincidence events of scattered α particles, recoil <sup>12</sup>C, and emitted γ rays for the first time. Further analysis will determine the radiative-decay probability, and puzzle over the radiative-decay probability.
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Effect of ground-state deformation on the isoscalar giant monopole resonance and the first observation of overtones of the isoscalar giant quadrupole resonance in rare-Earth Nd isotopes Reviewed International coauthorship
M. Abdullah, S. Bagchi, M.N. Harakeh, H. Akimune, D. Das, T. Doi, L.M. Donaldson, Y. Fujikawa, M. Fujiwara, T. Furuno, U. Garg, Y.K. Gupta, K.B. Howard, Y. Hijikata, K. Inaba, S. Ishida, M. Itoh, N. Kalantar-Nayestanaki, D. Kar, T. Kawabata, S. Kawashima, K. Khokhar, K. Kitamura, N. Kobayashi, Y. Matsuda, A. Nakagawa, S. Nakamura, K. Nosaka, S. Okamoto, S. Ota, S. Pal, R. Pramanik, S. Roy, S. Weyhmiller, Z. Yang, J.C. Zamora
Physics Letters B 855 138852 - 138852 2024.8
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Photodisintegration cross section of 4He in the giant dipole resonance energy region Reviewed
M. Murata, T. Kawabata, S. Adachi, H. Akimune, S. Amano, Y. Fujikawa, T. Furuno, K. Inaba, Y. Ishii, S. Miyamoto, M. Tsumura, H. Utsunomiya
Physical Review C 107 ( 6 ) 2023.6
Publisher：American Physical Society (APS)
DOI： 10.1103/physrevc.107.064317
Other Link： http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevC.107.064317/fulltext
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Tatsuya Furuno, Takanobu Doi, Kanako Himi, Takahiro Kawabata, Satoshi Adachi, Hidetoshi Akimune, Shiyo Enyo, Yuki Fujikawa, Yuto Hijikata, Kento Inaba, Masatoshi Itoh, Shigeru Kubono, Yohei Matsuda, Isao Murata, Motoki Murata, Shintaro Okamoto, Kosuke Sakanashi, Shingo Tamaki
EPJ Web of Conferences 260 11010 - 11010 2022
Publisher：EDP Sciences
The reaction rate of the triple-alpha reaction can be enhanced in hot and dense environments due to the deexcitation of the Hoyle state in <sup>12</sup>C by neutrons. The cross section of the deexcitation should be determined for the enhanced reaction rate. We plan to obtain the cross section by measuring the inverse reaction using a neutron beam around 10 MeV and an active target system. In the present paper, we report a proof-of-principle experiment using a neutron beam at 14 MeV. The obtained cross section is consistent with a previous result, demonstrating the validity of our method.
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Candidates for the 5α condensed state in 20Ne Reviewed
S. Adachi, Y. Fujikawa, T. Kawabata, H. Akimune, T. Doi, T. Furuno, T. Harada, K. Inaba, S. Ishida, M. Itoh, C. Iwamoto, N. Kobayashi, Y. Maeda, Y. Matsuda, M. Murata, S. Okamoto, A. Sakaue, R. Sekiya, A. Tamii, M. Tsumura
Physics Letters B 819 136411 - 136411 2021.8
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First experimental determination of the radiative-decay probability of the 31− state in 12C for estimating the triple alpha reaction rate in high temperature environments Reviewed International coauthorship
M. Tsumura, T. Kawabata, Y. Takahashi, S. Adachi, H. Akimune, S. Ashikaga, T. Baba, Y. Fujikawa, H. Fujimura, H. Fujioka, T. Furuno, T. Hashimoto, T. Harada, M. Ichikawa, K. Inaba, Y. Ishii, N. Itagaki, M. Itoh, C. Iwamoto, N. Kobayashi, A. Koshikawa, S. Kubono, Y. Maeda, Y. Matsuda, S. Matsumoto, K. Miki, T. Morimoto, M. Murata, T. Nanamura, I. Ou, S. Sakaguchi, A. Sakaue, M. Sferrazza, K.N. Suzuki, T. Takeda, A. Tamii, K. Watanabe, Y.N. Watanabe, H.P. Yoshida, J. Zenihiro
Physics Letters B 817 136283 - 136283 2021.6
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Signature of a possible α -cluster state in N= Z doubly-magic 56 Ni
S. Bagchi, H. Akimune, J. Gibelin, M. N. Harakeh, N. Kalantar-Nayestanaki, N. L. Achouri, B. Bastin, K. Boretzky, H. Bouzomita, M. Caamaño, L. Càceres, S. Damoy, F. Delaunay, B. Fernández-Domínguez, M. Fujiwara, U. Garg, G. F. Grinyer, O. Kamalou, E. Khan, A. Krasznahorkay, G. Lhoutellier, J. F. Libin, S. Lukyanov, K. Mazurek, M. A. Najafi, J. Pancin, Y. Penionzhkevich, L. Perrot, R. Raabe, C. Rigollet, T. Roger, S. Sambi, H. Savajols, M. Senoville, C. Stodel, L. Suen, J. C. Thomas, M. Vandebrouck, J. Van de Walle
European Physical Journal A 56 ( 11 ) 2020.11
Publisher：Springer Science and Business Media Deutschland GmbH
An inelastic α-scattering experiment on the unstable N= Z, doubly-magic 56Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High multiplicity for α-particle emission was observed within the limited phase-space of the experimental setup. This observation cannot be explained by means of the statistical-decay model. The ideal classical gas model at kT = 0.4 MeV reproduces fairly well the experimental momentum distribution and the observed multiplicity of α particles corresponds to an excitation energy around 96 MeV. The method of distributed mα-decay ensembles is in agreement with the experimental results if we assume that the α-gas state in 56Ni exists at around 113-17+15 MeV. These results suggest that there may exist an exotic state consisting of many α particles at the excitation energy of 113-17+15 MeV.
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Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A = 90 Reviewed International coauthorship
K.B. Howard, U. Garg, M. Itoh, H. Akimune, M. Fujiwara, T. Furuno, Y.K. Gupta, M.N. Harakeh, K. Inaba, Y. Ishibashi, K. Karasudani, T. Kawabata, A. Kohda, Y. Matsuda, M. Murata, S. Nakamura, J. Okamoto, S. Ota, J. Piekarewicz, A. Sakaue, M. Şenyiğit, M. Tsumura, Y. Yang
Physics Letters B 807 135608 - 135608 2020.8
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Spin-dipole nuclear matrix element for the double beta decay of 76Ge by the (3He, t) charge-exchange reaction Reviewed International coauthorship
H Akimune, H Ejiri, F Hattori, C Agodi, M Alanssari, F Cappuzzello, D Carbone, M Cavallaro, G Coló, F Diel, C A Douma, D Frekers, H Fujita, Y Fujita, M Fujiwara, G Gey, M N Harakeh, K Hatanaka, K Heguri, M Holl, A Inoue, N Kalantar-Nayestanaki, Y F Niu, P Puppe, P C Ries, A Tamii, V Werner, K Zuber
Journal of Physics G: Nuclear and Particle Physics 47 ( 5 ) 2020.5
Joint Work
Publisher：{IOP} Publishing
Nuclear matrix elements (NMEs) for double beta decays (DBDs) are crucial for studying the neutrino mass and other neutrino properties beyond the standard electro-weak model by measuring neutrino-less DBDs. The spin-dipole (SD) J π = 2- NME is one of the major components associated with the DBD NME. The SD NME for 76Ge was derived for the first time by using the 74,76 Ge (3He, t) at RCNP Osaka. The obtained SD NME for the 76Ge → 76As ground-state transition is in natural units. This is smaller by a coefficient around k ≈ 0.2 with respect to the quasi-particle model NME. The impact of the reduced (quenched) SD NME on DBD neutrino studies is discussed.
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Measurement of 4He Photodisintegration in the Giant Dipole Resonance Region Reviewed
Motoki Murata, Satoshi Adachi, Hidetoshi Akimune, Yuki Fujikawa, Tatsuya Furuno, Kento Inaba, Takahiro Kawabata, Miho Tsumura
Proceedings of the 15th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG15) 2020.3
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Search for α-Condensed State in 20Ne Reviewed
Yuki Fujikawa, Satoshi Adachi, Takahiro Kawabata, Miho Tsumura, Akane Sakaue, Kento Inaba, Takanobu Doi, Ryohei Fujii, Haruki Furuta, Takeshi Harada, Shintaro Okamoto, Ryohei Sekiya, Atsushi Tamii, Nobuyuki Kobayashi, Tatsuya Furuno, Masatoshi Itoh, Yohei Matsuda, Shunya Ishida, Yukie Maeda, Kotaro Nonaka, Chihiro Iwamoto, Hidetoshi Akimune
Proceedings of the 15th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG15) 2020.3
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Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility Reviewed International coauthorship
K.B. Howard, U. Garg, M. Itoh, H. Akimune, S. Bagchi, T. Doi, Y. Fujikawa, M. Fujiwara, T. Furuno, M.N. Harakeh, Y. Hijikata, K. Inaba, S. Ishida, N. Kalantar-Nayestanaki, T. Kawabata, S. Kawashima, K. Kitamura, N. Kobayashi, Y. Matsuda, A. Nakagawa, S. Nakamura, K. Nosaka, S. Okamoto, S. Ota, S. Weyhmiller, Z. Yang
Physics Letters B 801 135185 - 135185 2020.2
Joint Work
Publisher：Elsevier {BV}
© 2019 Recent data on isoscalar giant monopole resonance (ISGMR) in the calcium isotopes 40,44,48Ca have suggested that Kτ, the asymmetry term in the nuclear incompressibility, has a positive value. A value of Kτ>0 is entirely incompatible with present theoretical frameworks and, if correct, would have far-reaching implications on our understanding of myriad nuclear and astrophysical phenomena. This paper presents results of an independent ISGMR measurement with the 40,42,44,48Ca(α,α′) reaction at Eα=386 MeV. These results conclusively discount the possibility of a positive value for Kτ, and are consistent with the previously-obtained values for this quantity.
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Gamow-Teller strength distributions of Sb-116 and Sb-122 using the (He-3,t) charge-exchange reaction Reviewed International coauthorship
Douma C. A, Agodi C, Akimune H, Alanssari M, Cappuzzello F, Carbone D, Cavallaro M, Colo G, Diel F, Ejiri H, Frekers D, Fujita H, Fujita Y, Fujiwara M, Gey G, Harakeh M. N, Hatanaka K, Hattori F, Heguri K, Holl M, Inoue A, Kalantar-Nayestanaki N, Niu Y. F, Puppe P, Ries P. C, Tamii A, Werner V, Zegers R. G. T, Zuber K
EUROPEAN PHYSICAL JOURNAL A 56 ( 2 ) 2020.2
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Measurement of gamma rays from giant resonances excited by the C-12(p, p ') reaction at 392 MeV and 0 degrees Reviewed International coauthorship
Reen M. S, Ou I, Sudo T, Fukuda D, Mori T, Ali A, Koshio Y, Sakuda M, Tamii A, Aoi I. N, Yosoi M, Ideguchi E, Suzuki T, Yamamoto T, Iwamoto C, Kawabata T, Adachi S, Tsumura M, Murata M, Furuno T, Akimune H, Yano T, Dhir R
PHYSICAL REVIEW C 100 ( 2 ) 2019.8
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Systematic analysis of inelastic scattering off self-conjugate A=4n nuclei Reviewed
S. Adachi, T. Kawabata, K. Minomo, T. Kadoya, N. Yokota, H. Akimune, T. Baba, H. Fujimura, M. Fujiwara, Y. Funaki, T. Furuno, T. Hashimoto, K. Hatanaka, K. Inaba, Y. Ishii, M. Itoh, C. Iwamoto, K. Kawase, Y. Maeda, H. Matsubara, Y. Matsuda, H. Matsuno, T. Morimoto, H. Morita, M. Murata, T. Nanamura, I. Ou, S. Sakaguchi, Y. Sasamoto, R. Sawada,, Y. Shimizu, K. Suda, A. Tamii, Y. Tameshige, M. Tsumura, M. Uchida, T. Uesaka, H. P. Yoshida, and S. Yoshida,
PHYSICAL REVIEW C 97 ( 014601 ) 014601 2018.1
Joint Work
DOI： https://doi.org/10.1103/PhysRevC.97.014601
Other Link： https://journals.aps.org/prc/
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Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei
S. Adachi, T. Kawabata, K. Minomo, T. Kadoya, N. Yokota, H. Akimune, T. Baba, H. Fujimura, M. Fujiwara, Y. Funaki, T. Furuno, T. Hashimoto, K. Hatanaka, K. Inaba, Y. Ishii, M. Itoh, C. Iwamoto, K. Kawase, Y. Maeda, H. Matsubara, Y. Matsuda, H. Matsuno, T. Morimoto, H. Morita, M. Murata, T. Nanamura, I. Ou, S. Sakaguchi, Y. Sasamoto, R. Sawada, Y. Shimizu, K. Suda, A. Tamii, Y. Tameshige, M. Tsumura, M. Uchida, T. Uesaka, H. P. Yoshida, S. Yoshida
Physical Review C 97 ( 1 ) 2018.1
Joint Work
© 2018 American Physical Society. We systematically measured the differential cross sections of inelastic α scattering off self-conjugate A=4n nuclei at two incident energies Eα=130MeV and 386MeV at Research Center for Nuclear Physics, Osaka University. The measured cross sections were analyzed by the distorted-wave Born-approximation (DWBA) calculation using the single-folding potentials, which are obtained by folding macroscopic transition densities with the phenomenological αN interaction. The DWBA calculation with the density-dependent αN interaction systematically overestimates the cross sections for the ΔL=0 transitions. However, the DWBA calculation using the density-independent αN interaction reasonably well describes all the transitions with ΔL=0-4. We examined uncertainties in the present DWBA calculation stemming from the macroscopic transition densities, distorting potentials, phenomenological αN interaction, and coupled channel effects in C12. It was found that the DWBA calculation is not sensitive to details of the transition densities nor the distorting potentials, and the phenomenological density-independent αN interaction gives reasonable results. The coupled-channel effects are negligibly small for the 21+ and 31- states in C12, but not for the 02+ state. However, the DWBA calculation using the density-independent interaction at Eα=386MeV is still reasonable even for the 02+ state. We concluded that the macroscopic DWBA calculations using the density-independent interaction are reliably applicable to the analysis of inelastic α scattering at Eα∼100MeV/u.
DOI： 10.1103/PhysRevC.97.014601
Other Link： http://orcid.org/0000-0001-5237-5718
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Isoscalar giant monopole, dipole, and quadrupole resonances in Zr 90,92 and Mo 92 International coauthorship
Gupta Y.K, Howard K.B, Garg U, Matta J.T, ?enyi?it M, Itoh M, Ando S, Aoki T, Uchiyama A, Adachi S, Fujiwara M, Iwamoto C, Tamii A, Akimune H, Kadono C, Matsuda Y, Nakahara T, Furuno T, Kawabata T, Tsumura M, Harakeh M.N, Kalantar-Nayestanaki N.
Physical Review C 97 ( 6 ) 2018
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Effect of the nuclear medium on -cluster excitation in 6Li Reviewed
Tamio Yamagata, Shintaro Nakayama, Hidetoshi Akimune, and Syuji Miyamoto
PHYSICAL REVIEW C 95 ( 044307 ) 044307 2017.4
Joint Work
DOI： https://doi.org/10.1103/PhysRevC.95.044307
Other Link： https://journals.aps.org/prc/
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Effect of the nuclear medium on α -cluster excitation in Li 6
Yamagata T, Nakayama S, Akimune H, Miyamoto S.
Physical Review C 95 ( 4 ) 2017
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The measurement of 4He photodisintegration with MAIKo active target
Murata M, Adachi S, Akimune H, Furuno T, Kawabata T, Tsumura M
Journal of Physics: Conference Series 863 ( 1 ) 2017
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Search for the rare γ-decay mode in 12C
Tsumura M, Kawabata T, Furuno T, Koshikawa A, Murata M, Morimoto T, Adachi S, Tamii A, Hatanaka K, Ito T, Zenihiro J, Kubono S, Itoh M, Matsuda Y, Maeda Y, Sakaguchi S, Akimune H, Fujimura H, Ou I, Hashimoto T, Iwamoto C
Journal of Physics: Conference Series 863 ( 1 ) 2017
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Measurement of microwave radiation from electron beam in the atmosphere Reviewed International coauthorship
IS Ohta, H Akimune, M Fukushima, D Ikeda, Y Inome, JN Matthews, S Ogio, H Sagawa, T Sako, T Shibata, T Yamamoto
Nucl. Inst, Meth. A 810 44 2016.11
Joint Work
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Are there nuclear structure effects on the isoscalar giant monopole resonance and nuclear incompressibility near A∼ 90? Reviewed
YK Gupta, U Garg, KB Howard, JT Matta, M Şenyiğit, M Itoh, S Ando, T Aoki, A Uchiyama, S Adachi, M Fujiwara, C Iwamoto, A Tamii, H Akimune, C Kadono, Y Matsuda, T Nakahara, T Furuno, T Kawabata, M Tsumura, MN Harakeh, N Kalantar-Nayestanaki
Phys. Lett. B 760 482 2016.11
Joint Work
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Effect of ground-state deformation on isoscalar giant resonances in Si 28 Reviewed International coauthorship
T Peach, U Garg, YK Gupta, J Hoffman, JT Matta, D Patel, PV Madhusudhana Rao, K Yoshida, M Itoh, M Fujiwara, K Hara, H Hashimoto, K Nakanishi, M Yosoi, H Sakaguchi, S Terashima, S Kishi, T Murakami, M Uchida, Y Yasuda, H Akimune, T Kawabata, MN Harakeh, G Colò
Phys. Rev. C 93 64325 2016.11
Joint Work
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nterference Effect between ϕ and Λ (1520) Production Channels in the γ p→ K+ K− p Reaction near Threshold Reviewed International coauthorship
SY Ryu, JK Ahn, T Nakano, DS Ahn, S Ajimura, H Akimune, Y Asano, WC Chang, JY Chen, S Daté, H Ejiri, H Fujimura, M Fujiwara, S Fukui, S Hasegawa, K Hicks, K Horie, T Hotta, SH Hwang, K Imai, T Ishikawa, T Iwata, Y Kato, H Kawai, K Kino, H Kohri, Y Kon, N Kumagai, PJ Lin, Y Maeda, S Makino, T Matsuda, N Matsuoka, T Mibe, M Miyabe, M Miyachi, Y Morino, N Muramatsu, R Murayama, Y Nakatsugawa, M Niiyama, M Nomachi, Y Ohashi, H Ohkuma, T Ohta, T Ooba, DS Oshuev, JD Parker, C Rangacharyulu, A Sakaguchi, T Sawada, PM Shagin, Y Shiino, H Shimizu, EA Strokovsky, Y Sugaya, M Sumihama, AO Tokiyasu, Y Toi, H Toyokawa, T Tsunemi, M Uchida, M Ungaro, A Wakai, CW Wang, SC Wang, K Yonehara, T Yorita, M Yoshimura, M Yosoi, RGT Zegers, LEPS Collaboration
Phys. Rev. Lett. 116 232001 2016.11
Joint Work
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Deformation effects on isoscalar giant resonances in Mg 24 Reviewed International coauthorship
YK Gupta, U Garg, J Hoffman, J Matta, PV Madhusudhana Rao, D Patel, T Peach, K Yoshida, M Itoh, M Fujiwara, K Hara, H Hashimoto, K Nakanishi, M Yosoi, H Sakaguchi, S Terashima, S Kishi, T Murakami, M Uchida, Y Yasuda, H Akimune, T Kawabata, MN Harakeh
Phys. Rev. C 93 44324 2016.11
Joint Work
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Spatial anisotropy of neutrons emitted from the Fe 56 (γ, n) Fe 55 reaction with a linearly polarized γ-ray beam Reviewed
T Hayakawa, T Shizuma, S Miyamoto, S Amano, A Takemoto, M Yamaguchi, K Horikawa, H Akimune, S Chiba, K Ogata, M Fujiwara
Phys. Rev. C 93 44313 2016.11
Joint Work
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Measurement of the 77Se (γ, n) cross section and uncertainty evaluation of the 79Se (n, γ) cross section Reviewed
Fumito Kitatani, Hideo Harada, Shinji Goko, Nobuyuki Iwamoto, Hiroaki Utsunomiya, Hidetoshi Akimune, Hiroyuki Toyokawa, Kawakatsu Yamada, Masayuki Igashira
Journal of Nuclear Science and Technology 53 457 2016.11
Joint Work
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Are there nuclear structure effects on the isoscalar giant monopole resonance and nuclear incompressibility near A_ 90? International coauthorship
YK Gupta, U Garg, KB Howard, JT Matta, M _enyi_it, M Itoh, S Ando, T Aoki, A Uchiyama, S Adachi, M Fujiwara, C Iwamoto, A Tamii, H Akimune, C Kadono, Y Matsuda, T Nakahara, T Furuno, T Kawabata, M Tsumura, MN Harakeh, N Kalantar-Nayestanaki
Phys. Lett. B 760 482 - 485 2016.11
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Interference Effect between phi and Lambda(1520) Production Channels in the gamma p -> K(+)K(-)p Reaction near Threshold International coauthorship
S. Y. Ryu, J. K. Ahn, T. Nakano, D. S. Ahn, S. Ajimura, H. Akimune, Y. Asano, W. C. Chang, J. Y. Chen, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, S. Hasegawa, K. Hicks, K. Horie, T. Hotta, S. H. Hwang, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, K. Kino, H. Kohri, Y. Kon, N. Kumagai, P. J. Lin, Y. Maeda, S. Makino, T. Matsuda, N. Matsuoka, T. Mibe, M. Miyabe, M. Miyachi, Y. Morino, N. Muramatsu, R. Murayama, Y. Nakatsugawa, S. I. Nam, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ohta, T. Ooba, D. S. Oshuev, J. D. Parker, C. Rangacharyulu, A. Sakaguchi, T. Sawada, P. M. Shagin, Y. Shiino, H. Shimizu, E. A. Strokovsky, Y. Sugaya, M. Sumihama, A. O. Tokiyasu, Y. Toi, H. Toyokawa, T. Tsunemi, M. Uchida, M. Ungaro, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G. T. Zegers
PHYSICAL REVIEW LETTERS 116 ( 23 ) 232001 2016.6
Joint Work
Publisher：AMER PHYSICAL SOC
The phi-Lambda(1520) interference effect in the gamma p -> K(+)K(-)p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between phi and Lambda(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K- pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the root s = 2.1 GeV bump structure in forward differential cross sections for phi photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.
DOI： 10.1103/PhysRevLett.116.232001
Other Link： http://orcid.org/0000-0001-5237-5718
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Effect of ground-state deformation on isoscalar giant resonances in Si-28 International coauthorship
T. Peach, U. Garg, Y. K. Gupta, J. Hoffman, J. T. Matta, D. Patel, P. V. Madhusudhana Rao, K. Yoshida, M. Itoh, M. Fujiwara, K. Hara, H. Hashimoto, K. Nakanishi, M. Yosoi, H. Sakaguchi, S. Terashima, S. Kishi, T. Murakami, M. Uchida, Y. Yasuda, H. Akimune, T. Kawabata, M. N. Harakeh, G. Colo
PHYSICAL REVIEW C 93 ( 6 ) 64325 2016.6
Joint Work
Publisher：AMER PHYSICAL SOC
Multipole strength distributions for isoscalar L <= 2 transitions in Si-28 have been extracted using 386-MeV inelastic a scattering at extremely forward angles, including 0 degrees. Observed strength distributions are in good agreement with microscopic calculations for an oblate-deformed ground state. In particular, a large peak at an excitation energy of 17.7 MeV in the isoscalar giant monopole resonance strength is consistent with the calculations.
DOI： 10.1103/PhysRevC.93.064325
Other Link： http://orcid.org/0000-0001-5237-5718
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T. Hayakawa, T. Shizuma, S. Miyamoto, S. Amano, A. Takemoto, M. Yamaguchi, K. Horikawa, H. Akimune, S. Chiba, K. Ogata, M. Fujiwara
PHYSICAL REVIEW C 93 ( 4 ) 44313 2016.4
Joint Work
Publisher：AMER PHYSICAL SOC
We have measured the azimuthal anisotropy of neutrons emitted from the Fe-56(gamma, n)Fe-55 reaction with a linearly polarized gamma-ray beam generated by laser Compton scattering at NewSUBARU. Neutron yields at the polar angle of 90 degrees have been measured as a function of the azimuthal angle phi between the detector and the linear polarization plane of the gamma-ray beam. The azimuthal anisotropy of neutrons measured at phi = 0 degrees, 10 degrees, 25 degrees, 45 degrees, 60 degrees, 70 degrees, and 90 degrees has been well reproduced using a theoretically predicted function of a + b cos(2 phi).
DOI： 10.1103/PhysRevC.93.044313
Other Link： http://orcid.org/0000-0001-5237-5718
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Fumito Kitatani, Hideo Harada, Shinji Goko, Nobuyuki Iwamoto, Hiroaki Utsunomiya, Hidetoshi Akimune, Hiroyuki Toyokawa, Kawakatsu Yamada, Masayuki Igashira
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 53 ( 4 ) 475 - 485 2016.4
Joint Work
Publisher：TAYLOR & FRANCIS LTD
The Se-77 (gamma, n) cross section was measured for the energy range from 7.6 to 13.8 MeV by using quasi-monochromatic laser-Compton scattering gamma-rays. The advanced method to deduce gamma-ray strength functions from (gamma, n) cross section was developed. By utilizing the method, the gamma-ray strength functions of Se-77,Se- 78,Se- 80 were deduced so as to reproduce the Se-77,Se- 78,Se- 80 (gamma, n) cross sections measured in this work and previous systematic measurements. The inverse (n, gamma) cross sections for Se-76,Se- 77,Se- 79 isotopes were calculated using the statistical model calculation code CCONE with the deduced gamma-ray strength functions. The uncertainty of the calculated Se-79(n, gamma)Se-80 cross section was evaluated by comparing the calculations and the experimental data on Se-76,Se- 77 (n, gamma) cross sections.
DOI： 10.1080/00223131.2015.1056760
Other Link： http://orcid.org/0000-0001-5237-5718
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Deformation effects on isoscalar giant resonances in Mg-24
Y. K. Gupta, U. Garg, J. Hoffman, J. Matta, P. V. Madhusudhana Rao, D. Patel, T. Peach, K. Yoshida, M. Itoh, M. Fujiwara, K. Hara, H. Hashimoto, K. Nakanishi, M. Yosoi, H. Sakaguchi, S. Terashima, S. Kishi, T. Murakami, M. Uchida, Y. Yasuda, H. Akimune, T. Kawabata, M. N. Harakeh
PHYSICAL REVIEW C 93 ( 4 ) 44324 2016.4
Joint Work
Publisher：AMER PHYSICAL SOC
Strength distributions for isoscalar giant resonances with multipolarity L <= 2 have been determined in Mg-24 from "instrumental background-free" inelastic scattering of 386-MeV alpha particles at extreme forward angles, including 0 degrees. The isoscalar E0, E1, and E2 strengths are observed to be 57 +/- 7%, 111.1(-7.2)(+10.9)%, and 148.6 +/- 7.3%, respectively, of their energy-weighted sum rules in the excitation energy range of 6 to 35 MeV. The isoscalar giant monopole (ISGMR) and quadrupole (ISGQR) resonances exhibit a prominent K splitting which is consistent with microscopic theory for a prolate-deformed ground state of Mg-24. For the ISGQR it is due to splitting of the three K components, whereas for the ISGMR it is due to its coupling to the K = 0 component of the ISGQR. Deformation effects on the isoscalar giant dipole resonance are less pronounced, however.
DOI： 10.1103/PhysRevC.93.044324
Other Link： http://orcid.org/0000-0001-5237-5718
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Measurement of microwave radiation from electron beam in the atmosphere
I. S. Ohta, H. Akimune, M. Fukushima, D. Ikeda, Y. Inome, J. N. Matthews, S. Ogio, H. Sagawa, T. Sako, T. Shibata, T. Yamamoto
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 810 44 - 50 2016.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
We report the use of an electron light source (ELS) located at the Telescope Array Observatory in Utah, USA, to measure the isotropic microwave radiation from air showers. To simulate extensive air showers, the ELS emits an electron beam into the atmosphere and a parabola antenna system for the satellite communication is used to measure the microwave radiation from the electron beam. Based on this measurement, an upper limit on the intensity of a 12.5 GHz microwave radiation at 0.5 m from a 10(18) eV air shower was estimated to be 3.96 x 10(-16) W m(-2) Hz(-1) with a 95% confidence level. (C) 2015 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.nima.2015.11.113
Other Link： http://orcid.org/0000-0001-5237-5718
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S. Bagchi, J. Gibelin, M. N. Harakeh, N. Kalantar-Nayestanaki, N. L. Achouri, H. Akimune, B. Bastin, K. Boretzky, H. Bouzomita, M. Caamano, L. Caceres, S. Damoy, F. Delaunay, B. Fernandez-Dominguez, M. Fujiwara, U. Garg, G. F. Grinyer, O. Kamalou, E. Khan, A. Krasznahorkay, G. Lhoutellier, J. F. Libin, S. Lukyanov, K. Mazurek, M. A. Najafi, J. Pancin, Y. Penionzhkevich, L. Perrot, R. Raabe, C. Rigollet, T. Roger, S. Sambi, H. Savajols, M. Senoville, C. Stodel, L. Suen, J. C. Thomas, M. Vandebrouck, J. Van de Walle
PHYSICS LETTERS B 751 371 - 375 2015.12
Joint Work
Publisher：ELSEVIER SCIENCE BV
The Isoscalar Giant Monopole Resonance (ISGMR) and the Isoscalar Giant Dipole Resonance (ISGDR) compression modes have been studied in the doubly-magic unstable nucleus Ni-56. They were measured by inelastic alpha-particle scattering in inverse kinematics at 50MeV/u with the MAYA active target at the GANIL facility. The centroid of the ISGMR has been obtained at E-x= 19.1 +/- 0.5 MeV. Evidence for the low-lying part of the ISGDR has been found at E-x = 17.4 +/- 0.7 MeV. The strength distribution for the dipole mode shows similarity with the prediction from the Hartree-Fock (HF) based random-phase approximation (RPA)[1]. These measurements confirm inelastic a-particle scattering as a suitable probe for exciting the ISGMR and the ISGDR modes in radioactive isotopes in inverse kinematics. (C) 2015 The Authors. Published by Elsevier B.V.
DOI： 10.1016/j.physletb.2015.10.060
Other Link： http://orcid.org/0000-0001-5237-5718
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Precision evaluation of the Ga 71 (ν e, e−) solar neutrino capture rate from the (He 3, t) charge-exchange reaction Reviewed
D Frekers, T Adachi, H Akimune, M Alanssari, BA Brown, BT Cleveland, H Ejiri, H Fujita, Y Fujita, M Fujiwara, VN Gavrin, MN Harakeh, K Hatanaka, M Holl, C Iwamoto, A Lennarz, A Okamoto, H Okamura, T Suzuki, A Tamii
Phys. Rev. C 91 34608 2015.11
Joint Work
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Observation of isoscalar multipole strengths in exotic doubly-magic 56 Ni in inelastic α scattering in inverse kinematics Reviewed
S Bagchi, J Gibelin, MN Harakeh, N Kalantar-Nayestanaki, NL Achouri, H Akimune, B Bastin, K Boretzky, H Bouzomita, M Caamaño, L Càceres, S Damoy, F Delaunay, B Fernández-Domínguez, M Fujiwara, U Garg, GF Grinyer, O Kamalou, E Khan, A Krasznahorkay, G Lhoutellier, JF Libin, S Lukyanov, K Mazurek, MA Najafi, J Pancin, Y Penionzhkevich, L Perrot, Riccardo Raabe, C Rigollet, T Roger, S Sambi, H Savajols, M Senoville, C Stodel, L Suen, JC Thomas, M Vandebrouck, J Van de Walle
Phys. Lett. B 751 371 2015.11
Joint Work
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Splitting of ISGMR strength in the light-mass nucleus 24 Mg due to ground-state deformation Reviewed
YK Gupta, U Garg, JT Matta, D Patel, T Peach, J Hoffman, K Yoshida, M Itoh, M Fujiwara, K Hara, H Hashimoto, K Nakanishi, M Yosoi, H Sakaguchi, S Terashima, S Kishi, T Murakami, M Uchida, Y Yasuda, H Akimune, T Kawabata, MN Harakeh
Phys. Let. B 748 343 2015.11
Joint Work
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Splitting of ISGMR strength in the light-mass nucleus Mg-24 due to ground-state deformation
Y. K. Gupta, U. Garg, J. T. Matta, D. Patel, T. Peach, J. Hoffman, K. Yoshida, M. Itoh, M. Fujiwara, K. Hara, H. Hashimoto, K. Nakanishi, M. Yosoi, H. Sakaguchi, S. Terashima, S. Kishi, T. Murakami, M. Uchida, Y. Yasuda, H. Akimune, T. Kawabata, M. N. Harakeh
PHYSICS LETTERS B 748 343 - 346 2015.9
Joint Work
Publisher：ELSEVIER SCIENCE BV
The isoscalar giant monopole resonance (ISGMR) strength distribution in Mg-24 has been determined from background-free inelastic scattering of 386-MeV alpha particles at extreme forward angles, including 0 degrees The ISGMR strength distribution has been observed for the first time to have a two-peak structure in a light-mass nucleus. This splitting of ISGMR strength is explained well by microscopic theory in terms of the prolate deformation of the ground state of Mg-24. (C) 2015 The Authors. Published by Elsevier B.V.
DOI： 10.1016/j.physletb.2015.07.021
Other Link： http://orcid.org/0000-0001-5237-5718
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D. Frekers, T. Adachi, H. Akimune, M. Alanssari, B. A. Brown, B. T. Cleveland, H. Ejiri, H. Fujita, Y. Fujita, M. Fujiwara, V. N. Gavrin, M. N. Harakeh, K. Hatanaka, M. Holl, C. Iwamoto, A. Lennarz, A. Okamoto, H. Okamura, T. Suzuki, A. Tamii
PHYSICAL REVIEW C 91 ( 3 ) 34608 2015.3
Joint Work
Publisher：AMER PHYSICAL SOC
A precision measurement of the Ga-71(He-3,t)Ge-71 charge-exchange reaction was performed. By using a rather complete set of theoretical form factors to describe the cross-section angular distributions over a large angular range, the Gamow-Teller strength distribution up to the effective neutron-separation energy in Ge-71 was extracted. The data and the analysis constrain the Ga-71(nu(e),e(-)) solar neutrino rate in a neutrino nonoscillation scenario. For nonoscillating neutrinos we report a solar neutrino capture rate of 122.4 +/- 3.4(stat) +/- 1.1(sys) SNU, which is lower than the presently accepted value of 132 +/- 18 SNU, though not in disagreement given the quoted errors.
DOI： 10.1103/PhysRevC.91.034608
Other Link： http://orcid.org/0000-0001-5237-5718
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Gupta Y.K, Garg U, Matta J.T, Patel D, Peach T, Hoffman J, Yoshida K, Itoh M, Fujiwara M, Hara K, Hashimoto H, Nakanishi K, Yosoi M, Sakaguchi H, Terashima S, Kishi S, Murakami T, Uchida M, Yasuda Y, Akimune H, Kawabata T, Harakeh M.N.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 751 597 2015
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I. Ou, Y. Yamada, T. Mori, T. Yano, M. Sakuda, A. Tamii, T. Suzuki, M. Yosoi, N. Aoi, E. Ideguchi, T. Hashimoto, K. Miki, T. Ito, C. Iwamoto, T. Yamamoto, H. Akimune
NUINT12: 8TH INTERNATIONAL WORKSHOP ON NEUTRINO-NUCLEUS INTERACTIONS IN THE FEW-GEV REGION 1663 2015
Joint Work
Publisher：AMER INST PHYSICS
We propose to measure the gamma-ray emission probability from excited states above 5 MeV including giant resonance of O-16 and C-12 as a function of excitation energy in 1-MeV step. Here, we measure both the excitation energy (E-x=5-30MeV) at the forward scattering angles (0 degrees-3 degrees) of the O-16, C-12 (p, p') reaction using Grand-Raiden Spectrometer and the energy of gamma-rays (E,) using an array of NaI(Tl) counters. The purpose of the experiment is to provide the basic and important information not only for the gamma-ray production from primary neutral-current neutrino-oxygen (-carbon) interactions but also for that from the secondary hadronic (neutron-oxygen and -carbon) interactions.
DOI： 10.1063/1.4919518
Other Link： http://orcid.org/0000-0001-5237-5718
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Search for the K− pp bound state via γd→ K+ π− X reaction at Eγ= 1.5–2.4 GeV Reviewed
LEPS Collaboration, H.Akimune
Phys. Lett. B 728 616 2014.11
Joint Work
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Excitation of giant monopole resonance in 208 Pb and 116 Sn using inelastic deuteron scattering Reviewed
D Patel, U Garg, M Itoh, H Akimune, GPA Berg, M Fujiwara, MN Harakeh, C Iwamoto, T Kawabata, K Kawase, JT Matta, T Murakami, A Okamoto, T Sako, KW Schlax, F Takahashi, M White, M Yosoi
Phys. Lett. B 735 378 2014.11
Joint Work
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Partial Photoneutron Cross Sections for 207,208 Pb Reviewed
T. Kondo, H. Utsunomiya, S. Goriely, C Iwamoto, H Akimune, Tamio Yamagata, Hiroyuki Toyokawa, H Harada, Fumito Kitatani, Y-W Lui, Stéphane Hilaire, Arjan J Koning
Nuclear Data Sheets 119 310 2014.11
Joint Work
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Development of high intensity laser-electron photon beams up to 2.9 GeV at the SPring-8 LEPS beamline Reviewed
N Muramatsu, Y Kon, S Daté, Y Ohashi, H Akimune, JY Chen, M Fujiwara, S Hasegawa, T Hotta, T Ishikawa, T Iwata, Y Kato, H Kohri, T Matsumura, T Mibe, Y Miyachi, Y Morino, T Nakano, Y Nakatsugawa, H Ohkuma, T Ohta, M Oka, T Sawada, A Wakai, K Yonehara, CJ Yoon, T Yorita, M Yosoi, LEPS Collaboration
Nucl. Inst Meth. A 737 184 2014.11
Joint Work
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Excitation of giant monopole resonance in Pb-208 and Sn-116 using inelastic deuteron scattering
D. Patel, U. Garg, M. Itoh, H. Akimune, G. P. A. Berg, M. Fujiwara, M. N. Harakeh, C. Iwamoto, T. Kawabata, K. Kawase, J. T. Matta, T. Murakami, A. Okamoto, T. Sako, K. W. Schlax, F. Takahashi, M. White, M. Yosoi
PHYSICS LETTERS B 735 387 - 390 2014.7
Joint Work
Publisher：ELSEVIER SCIENCE BV
The excitation of the isoscalar giant monopole resonance (ISGMR) in Pb-208 and Sn-116 has been investigated using small-angle (including 0 degrees) inelastic scattering of 100 MeV/u deuteron and multipole-decomposition analysis (MDA). The extracted strength distributions agree well with those from inelastic scattering of 100 MeV/u alpha particles. These measurements establish deuteron inelastic scattering at E-d similar to 100 MeV/u as a suitable probe for extraction of the ISGMR strength with MDA, making feasible the investigation of this resonance in radioactive isotopes in inverse kinematics. (C) 2014 The Authors. Published by Elsevier B.V.
DOI： 10.1016/j.physletb.2014.06.073
Other Link： http://orcid.org/0000-0001-5237-5718
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N. Muramatsu, Y. Kon, S. Date, Y. Ohashi, H. Akimune, J. Y. Chen, M. Fujiwara, S. Hasegawa, T. Hotta, T. Ishikawa, T. Iwata, Y. Kato, H. Kohri, T. Matsumura, T. Mibe, Y. Miyachi, Y. Morino, T. Nakano, Y. Nakatsugawa, H. Ohkuma, T. Ohta, M. Oka, T. Sawada, A. Wakai, K. Yonehara, C. J. Yoon, T. Yorita, M. Yosoi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 737 184 - 194 2014.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
A laser-Compton backscattering beam, which we call a 'Laser-Electron Photon' beam, was upgraded at the LEPS beamline of SPring-8. We accomplished the gains in backscattered photon beam intensities by factors of 1.5-1.8 with the injection of two adjacent laser beams or a higher power laser beam into the storage ring. The maximum energy of the photon beam was also extended from 2.4 GeV to 2.9 GeV with deep-ultraviolet lasers. The upgraded beams have been utilized for hadron photoproduction experiments at the LEPS beamline. Based on the developed methods, we plan he simultaneous injection of four high power laser beams at the LEPS2 beamline, which has been newly constructed at SPring-8. As a simulation result we expect an order of magnitude higher intensities close to 10(7) s(-1) and 10(6) s(-1) for tagged photons up to 2.4 GeV and 2.9 GeV, respectively. (C) 2013 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.nima.2013.11.039
Other Link： http://orcid.org/0000-0001-5237-5718
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Search for the K-pp bound state via gamma d -> K+pi X- reaction at E-gamma=1.5-2.4 GeV
A. O. Tokiyasu, M. Niiyama, J. D. Parker, D. S. Ahn, J. K. Ahn, S. Ajimura, H. Akimune, Y. Asano, W. C. Chang, J. Y. Chen, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, S. Hasegawa, K. Hicks, K. Horie, T. Hotta, S. H. Hwang, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, K. Kino, H. Kohri, Y. Kon, N. Kumagai, D. L. Lin, Y. Maeda, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, M. Miyachi, N. Muramatsu, R. Murayama, T. Nakano, Y. Nakatsugawa, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ohta, T. Ooba, D. S. Oshuev, C. Rangacharyulu, S. Y. Ryu, A. Sakaguchi, T. Sawada, P. M. Shagin, Y. Shiino, H. Shimizu, E. A. Strokovsky, Y. Sugaya, M. Sumihama, J. L. Tang, Y. Toi, H. Toyokawa, T. Tsunemi, M. Uchida, M. Ungaro, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G. T. Zegers
PHYSICS LETTERS B 728 616 - 621 2014.1
Joint Work
Publisher：ELSEVIER SCIENCE BV
A search for the K- pp bound state (the lightest kaonic nucleus) has been performed using the gamma d > K+pi X- reaction at E-gamma= 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K+pi(-) photo-production off deuterium (d(2)sigma/d cos theta(lab)(K+)/d cos theta(lab)(pi-)) has been measured for the first time in this energy region. A peak structure was searched for in the inclusive missing mass spectrum. A statistically significant peak structure was not observed in the region from 2.22 to 2.36 GeV/c(2). The upper limits of the differential cross section of the K- pp bound state production were determined to be (0.17-0.55), (0.55-1.7) and (1.1-2.9) mu b at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved,
DOI： 10.1016/j.physletb.2013.12.039
Other Link： http://orcid.org/0000-0001-5237-5718
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Cluster structure of broad resonances near threshold in 12C and 16O
Itoh M, Akimune H, Fujiwara M, Garg U, Hashimoto H, Kawabata T, Kawase K, Kishi S, Murakami T, Nakanishi K, Nakatsugawa Y, Nayak B.K, Sakaguchi H, Terashima S, Uchida M, Yasuda Y, Yosoi M, Zenihiro J.
Journal of Physics: Conference Series 569 ( 1 ) 2014
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Feasibility study to search for the rare γ-decay mode in 12C
Tsumura M, Kawabata T, Adachi S, Baba T, Furuno T, Ishii Y, Murata M, Kobayashi F, Kanada-En{'}Yo Y, Tamii A, Hashimoto T, Hatanaka K, Matsuda Y, Miki K, Iwamoto C, Ito T, Miura M, Zenihiro J, Kubono S, Itoh M, Ando S, Maeda Y, Sakaguchi S, Akimune H, Fujimura H, Ou I.
Journal of Physics: Conference Series 569 ( 1 ) 2014
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Pygmy Dipole Resonance and Dipole Polarizability in Zr-90
C. Iwamoto, A. Tamii, H. Utsunomiya, H. Akimune, H. Nakada, T. Shima, T. Hashimoto, T. Yamagata, T. Kawabata, Y. Fujita, H. Matsubara, T. Suzuki, H. Fujita, Y. Shimbara, M. Nagashima, M. Sakuda, T. Mori, T. Izumi, A. Okamoto, T. Kondo, T. -W. Lui, B. Bilgier, H. C. Kozer, K. Hatanaka
ORIGIN OF MATTER AND EVOLUTION OF GALAXIES 2013 1594 426 - 431 2014
Joint Work
Publisher：AMER INST PHYSICS
Electric dipole (El) reduced transition probability B(El) of Zr-90 was obtained by the inelastic proton scattering near 0 degrees using a 295 MeV proton beam and multipole decomposition analysis of the angular distribution by the distorted-wave Born approximation with the Hartree-Fock plus random-phase approximation model and inclusion of El Coulomb excitation, and the El strength of the pygmy dipole resonance was found in the vicinity of the neutron threshold in the low-energy tail of the giant dipole resonance. Using the data, we plan to determine the precise dipole polarizability alpha(D) which is defined as an inversely energy-weighted sum value of the elecrric dipole strength. The dipole polarizability is expected to constrain the symmetry energy term of the neutron matter equation of state. Thus systematical measurement of the dipole polarizability is important.
DOI： 10.1063/1.4874105
Other Link： http://orcid.org/0000-0001-5237-5718
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Isoscalar giant resonance strengths in 32S and possible excitation of superdeformed and 28Si + α cluster bandheads Reviewed
M. Itoh, S. Kishi, H. Sakaguchi, H. Akimune, M. Fujiwara, U. Garg, K. Hara, H. Hashimoto, J. Hoffman, T. Kawabata, K. Kawase, T. Murakami, K. Nakanishi, B. K. Nayak, S. Terashima, M. Uchida, Y. Yasuda, and M. Yosoi
PHys. Rev. C 88 064313 2013.12
Single Work
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M. Itoh, S. Kishi, H. Sakaguchi, H. Akimune, M. Fujiwara, U. Garg, K. Hara, H. Hashimoto, J. Hoffman, T. Kawabata, K. Kawase, T. Murakami, K. Nakanishi, B. K. Nayak, S. Terashima, M. Uchida, Y. Yasuda, M. Yosoi
Physical Review C - Nuclear Physics 88 ( 6 ) 64313 2013.12
Joint Work
Isoscalar giant resonances and low spin states in 32S have been measured with inelastic α scattering at extremely forward angles including zero degrees at Eα=386 MeV. By applying multipole decomposition analysis, various excited states are classified according to their spins and parities (Jπ), and are discussed in relation to the superdeformed and 28Si + α cluster bands. © 2013 American Physical Society.
DOI： 10.1103/PhysRevC.88.064313
Other Link： http://orcid.org/0000-0001-5237-5718
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Isospin mixing of the isobaric analog state studied in a high-resolution 56Fe(3He,t)56Co reaction Reviewed
H. Fujita, Y. Fujita, T. Adachi, H. Akimune, N. T. Botha, K. Hatanaka, H. Matsubara, K. Nakanishi, R. Neveling, A. Okamoto, Y. Sakemi, T. Shima, Y. Shimizu, F. D. Smit, T. Suzuki, A. Tamii, and M. Yosoi
Phys. Rev. C 88 054329 2013.10
Joint Work
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Isospin mixing of the isobaric analog state studied in a high-resolution 56Fe(3He,t)56Co reaction
H. Fujita, Y. Fujita, T. Adachi, H. Akimune, N. T. Botha, K. Hatanaka, H. Matsubara, K. Nakanishi, R. Neveling, A. Okamoto, Y. Sakemi, T. Shima, Y. Shimizu, F. D. Smit, T. Suzuki, A. Tamii, M. Yosoi
Phys. Rev. C 88 ( 5 ) 54329 2013.10
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"Testing the mutually enhanced magicity effect in nuclear incompressibility via the giant monopole resonance in the 204,206,208Pb isotopes " Reviewed
D.Patel, U.Garg, M.Fujiwara, T.Adachi, H.Akimune, G.P.A.Berg, M.N.Harakeh, M.Itoh, C.Iwamoto, A.Long, J.T.Matta, T.Murakami, A.Okamoto, K.Sault, R.Talwar, M.Uchida, M.Yosoi
Phys. Lett. B 726 178 2013.10
Joint Work
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D. Patel, U. Garg, M. Fujiwara, T. Adachi, H. Akimune, G. P. A. Berg, M. N. Harakeh, M. Itoh, C. Iwamoto, A. Long, J. T. Matta, T. Murakami, A. Okamoto, K. Sault, R. Talwar, M. Uchida, M. Yosoi
PHYSICS LETTERS B 726 ( 1-3 ) 178 - 181 2013.10
Joint Work
Publisher：ELSEVIER SCIENCE BV
Using inelastic alpha-scattering at extremely forward angles, including 0 degrees, the strength distributions of the isoscalar giant monopole resonance (ISGMR) have been measured in the Pb-204,Pb-206,Pb-208 isotopes in order to examine the proposed mutually enhanced magicity (MEM) effect on the nuclear incompressibility. The MEM effect had been suggested as a likely explanation of the "softness" of nuclear incompressibility observed in the ISGMR measurements in the Sn and Cd isotopes. Our experimental results rule out any manifestation of the MEM effect in nuclear incompressibility and leave the question of the softness of the open-shell nuclei unresolved still. (C) 2013 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2013.08.027
Other Link： http://orcid.org/0000-0001-5237-5718
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Photoneutron cross sections for Mo isotopes: A step toward a unified understanding of (γ,n) and (n,γ) reactions Reviewed
H. Utsunomiya, S. Goriely, T. Kondo, C. Iwamoto, H. Akimune, T. Yamagata, H. Toyokawa, H. Harada, F. Kitatani, Y.-W. Lui, A. C. Larsen, M. Guttormsen, P. E. Koehler, S. Hilaire, S. Péru, M. Martini, and A. J. Koning
Phys. Rev. C 88 015805 2013.7
Joint Work
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H. Utsunomiya, S. Goriely, T. Kondo, C. Iwamoto, H. Akimune, T. Yamagata, H. Toyokawa, H. Harada, F. Kitatani, Y. -W. Lui, A. C. Larsen, M. Guttormsen, P. E. Koehler, S. Hilaire, S. Peru, M. Martini, A. J. Koning
PHYSICAL REVIEW C 88 ( 1 ) 15805 2013.7
Joint Work
Publisher：AMER PHYSICAL SOC
Photoneutron cross sections were measured for Mo-94, Mo-95, Mo-96, Mo-97, Mo-98, and Mo-100 near the neutron threshold with quasi-monochromatic laser-Compton scattering gamma rays. The photoneutron data were analyzed with the Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model and the axially symmetric-deformed Gogny HFB plus QRPA model of E1 gamma-ray strength. Combining the gamma-ray strength function constrained by the present photoneutron data with either the nuclear resonance fluorescence data or the updated Oslo data to supplement the data below the neutron threshold, a thorough analysis of the reverse (n,gamma) cross sections is made whenever measurements are available. The Oslo data and the corresponding uncertainties are updated based on the latest results of the s-wave neutron spacing and the average radiative width determined in particular for Mo-96. Finally, radiative neutron capture cross sections for two radioactive nuclei, Mo-93 and Mo-99, are deduced with the gamma-ray strength function method.
DOI： 10.1103/PhysRevC.88.015805
Other Link： http://orcid.org/0000-0001-5237-5718
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Development of a 12 parabola observation system to detect Molecular Bremsstrahlung Radiation from air-showers
T. Yamamoto1, S. Ogio2, H. Akimune3, T. Fujii4, N. Sakurai5, M. Fukushima6 and H. Sagawa6
AIP Conf. Proc. 1536 229 2013.6
Joint Work
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Alpha cluster structure in 56Ni Reviewed
H Akimune1, M Fujiwara2, J Gibelin3, M N Harakeh4, L Achouri3, S Bagchi4, B Bastin5, K Boretzky12, H Bouzomita5, L Caceres5, S Damoy5, F Delaunay3, B Fernández-Domínguez3,14, M Caamano8, U Garg9, G F Grinyer5, N Kalantar-Nayestanaki4, O Kamalou5, E Khan6, A Krasznahorkay10, G Lhoutellier3, S Lukyanov13, K Mazurek11, M Najafi4, J Pancin5, Y Penionzkhevich13, L Perrot6, R Raabe7, C E Rigollet4, T Roger5, S Sambi7, H Savajols5, M Senoville3, C Stodel5, L Suen5, J C Thomas5, J van de Walle4 and M Vandebrouck6
Jou. of Phys. 436 012010 2013
Joint Work
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Itoh M, Akimune H, Fujiwara M, Garg U, Kawabata T, Kawase K, Murakami T, Nakanishi K, Nakatsugawa Y, Sakaguchi H, Terashima S, Uchida M, Yasuda Y, Yosoi M, Zenihiro J.
Journal of Physics: Conference Series 436 ( 1 ) 2013
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Yamamoto T, Akimune H, Fukushima M, Matthews J.N, Ogio S, Ohota I, Sagawa H, Sako T, Sakurai N, Shibata T
Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 2013-October 2013
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Ogio S, Yamamoto T, Kuramoto K, Iijima T, Akimune H, Fujii T, Sakurai N, Fukushima M, Sagawa H
Journal of Physics: Conference Series 409 ( 1 ) 2013
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Shoichi Ogio, Tokonatsu Yamamoto, Kazuyuki Kuramoto, Takashi Iijima, Hidetoshi Akimune, Toshihiro Fujii, Nobuyuki Sakurai, Masaki Fukushima, Hiroyuki Sagawa
UHECR 2012 - INTERNATIONAL SYMPOSIUM ON FUTURE DIRECTIONS IN UHECR PHYSICS 53 2013
Joint Work
Publisher：E D P SCIENCES
Microwave radiation from extensive air showers is expected to provide a new technique to observe UHECR. We insatlled and operate radio telescopes in Osaka and at Telescope Array site in Utah, USA. In Osaka, we are coincidentally operating two Ku band radio telescopes with an air shower array which consists of nine plastic scintillators with about 10 m separation. In Utah, we installed two telescopes just beside the Black Rock Mesa fluorescence detector (FD) station of the Telescope Array experiment, and we operated the radio telescopes coincidentally with FD event triggers. We report the experimental setups and the results of these measurements.
DOI： 10.1051/epjconf/20135308007
Other Link： http://orcid.org/0000-0001-5237-5718
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Alpha cluster structure in 56Ni
H Akimune, M Fujiwara, J Gibelin, M N Harakeh, L Achouri, S Bagchi, B Bastin, K Boretzky, H Bouzomita, L Caceres, S Damoy, F Delaunay, B Fern_ndez-Dom_nguez, M Caamano, U Garg, G F Grinyer, N Kalantar-Nayestanaki, O Kamalou, E Khan, A Krasznahorkay, G Lhoutellier, S Lukyanov, K Mazurek, M Najafi, J Pancin, Y Penionzkhevich, L Perrot, R Raabe, C E Rigollet, T Roger, S Sambi, H Savajols, M Senoville, C Stodel, L Suen, J C Thomas, J, van de Walle, M Vandebrouck
Jou. of Phys. 436 ( 1 ) 12010 2013
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T. Yamamoto, S. Ogio, H. Akimune, T. Fujii, N. Sakurai, M. Fukushima, H. Sagawa
5TH INTERNATIONAL WORKSHOP ON ACOUSTIC AND RADIO EEV NEUTRINO DETECTION ACTIVITIES (ARENA 2012) 1535 229 - 232 2013
Joint Work
Publisher：AMER INST PHYSICS
Two experiments for the detections of Molecular Bremsstrahlung Radiation (MBR) from air-shower are under development in West Japan, One of these systems consists of 12 parabola antennas. And the other one uses a 45 cm Broadcasting Satellite (BS) antenna in a scintillator array. Both experiments measure 12 GHz radio emission from air-showers. The setup and the status of these experiments will be reported.
DOI： 10.1063/1.4807554
Other Link： http://orcid.org/0000-0001-5237-5718
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D. Patel, U. Garg, M. Fujiwara, H. Akimune, G. P. A. Berg, M. N. Harakeh, M. Itoh, T. Kawabata, K. Kawase, B. K. Nayak, T. Ohta, H. Ouchi, J. Piekarewiczh, M. Uchida, H. P. Yoshida, M. Yosoi
PHYSICS LETTERS B 718 ( 2 ) 447 - 450 2012.12
Joint Work
Publisher：ELSEVIER SCIENCE BV
The isoscalar giant monopole resonance (ISGMR) in even-A Cd isotopes has been studied by inelastic alpha-scattering at 100 MeV/u and at extremely forward angles, including 0 degrees. The asymmetry term in the nuclear incompressibility extracted from the ISGMR in Cd isotopes is found to be K-tau = -555 +/- 75 MeV, confirming the value previously obtained from the Sn isotopes. ISGMR strength has been computed in relativistic RPA using NL3 and FSUGold effective interactions. Both models significantly overestimate the centroids of the ISGMR strength in the Cd isotopes. Combined with other recent theoretical effort, the question of the "softness" of the open-shell nuclei in the tin region remains open still. (C) 2012 Elsevier By. All rights reserved.
DOI： 10.1016/j.physletb.2012.10.056
Other Link： http://orcid.org/0000-0001-5237-5718
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High resolution (He-3,t) experiment on the double-beta decaying nuclei Te-128 and Te-130
P. Puppe, A. Lennarz, T. Adachi, H. Akimune, H. Ejiri, D. Frekers, H. Fujita, Y. Fujita, M. Fujiwara, E. Ganioglu, E. -W. Grewe, K. Hatanaka, R. Hodak, C. Iwamoto, N. T. Khai, A. Okamoto, H. Okamura, P. P. Povinec, G. Susoy, T. Suzuki, A. Tamii, J. H. Thies, M. Yosoi
PHYSICAL REVIEW C 86 ( 4 ) 44603 2012.10
Joint Work
Publisher：AMER PHYSICAL SOC
Gamow-Teller (GT) strength distributions have been investigated in a high-resolution (He-3,t) charge-exchange experiment on the double-beta (beta beta ) decaying nuclei Te-128 and Te-130. The experiment was carried out at the Research Center for Nuclear Physics, Osaka, with a 420-MeV incident He-3 beam and the Grand Raiden magnetic spectrometer. A final-state energy resolution of 35 keV was achieved. The extracted GT strength distributions at low excitation energies in the final nuclei I-128 and I-130 are presented and discussed in the context of the beta beta decay matrix elements for the two tellurium nuclei. The additional neutron pair in Te-130 seems to produce a moderate increase in the fragmentation of the low-energy GT distribution.
DOI： 10.1103/PhysRevC.86.044603
Other Link： http://orcid.org/0000-0001-5237-5718
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M. Freer, M. Itoh, T. Kawabata, H. Fujita, H. Akimune, Z. Buthelezi, J. Carter, R. W. Fearick, S. V. Foertsch, M. Fujiwara, U. Garg, N. Hashimoto, K. Kawase, S. Kishi, T. Murakami, K. Nakanishi, Y. Nakatsugawa, B. K. Nayak, R. Neveling, S. Okumura, S. M. Perez, P. Papka, H. Sakaguchi, Y. Sasamoto, F. D. Smit, J. A. Swartz, H. Takeda, S. Terashima, M. Uchida, I. Usman, Y. Yasuda, M. Yosoi, J. Zenihiro
PHYSICAL REVIEW C 86 ( 3 ) 34320 2012.9
Joint Work
Publisher：AMER PHYSICAL SOC
The C-12 excitation energy spectra populated in both proton and alpha-particle inelastic scattering measurements are examined. The data indicate the existence of a 2(+) state at E-x = 9.75(0.15) MeV with a width of 750(150) keV. It is believed that this state corresponds to the 2(+) excitation of the 7.65 MeV, 0(+), Hoyle state, which acts as the main path by which carbon is synthesized in stars. A simultaneous R-matrix analysis of the two sets of data indicates that the 2(+) state possesses a very large alpha-reduced width, approaching the Wigner limit. This would indicate that the state is associated with a highly clustered structure. The potential geometric arrangements of the clusters is discussed.
DOI： 10.1103/PhysRevC.86.034320
Other Link： http://orcid.org/0000-0001-5237-5718
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Total and partial photoneutron cross sections for Pb isotopes
T. Kondo, H. Utsunomiya, S. Goriely, I. Daoutidis, C. Iwamoto, H. Akimune, A. Okamoto, T. Yamagata, M. Kamata, O. Itoh, H. Toyokawa, Y. -W. Lui, H. Harada, F. Kitatani, S. Hilaire, A. J. Koning
PHYSICAL REVIEW C 86 ( 1 ) 14316 2012.7
Joint Work
Publisher：AMER PHYSICAL SOC
Using quasimonochromatic laser-Compton scattering gamma rays, total photoneutron cross sections were measured for Pb-206,Pb-207,Pb-208 near neutron threshold with a high-efficiency 4 pi neutron detector. Partial E1 and M1 photoneutron cross sections along with total cross sections were determined for Pb-207,Pb-208 at four energies near threshold by measuring anisotropies in photoneutron emission with linearly polarized gamma rays. The E1 strength dominates over the M1 strength in the neutron channel where E1 photoneutron cross sections show extra strength of the pygmy dipole resonance in Pb-207,Pb-208 near the neutron threshold corresponding to 0.32%-0.42% of the Thomas-Reiche-Kuhn sum rule. Several mu(2)(N) units of B(M1) up arrow strength were observed in Pb-207,Pb-208 just above neutron threshold, which correspond to an M1 cross section less than 10% of the total photoneutron cross section.
DOI： 10.1103/PhysRevC.86.014316
Other Link： http://orcid.org/0000-0001-5237-5718
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C. Iwamoto, H. Utsunomiya, A. Tamii, H. Akimune, H. Nakada, T. Shima, T. Yamagata, T. Kawabata, Y. Fujita, H. Matsubara, Y. Shimbara, M. Nagashima, T. Suzuki, H. Fujita, M. Sakuda, T. Mori, T. Izumi, A. Okamoto, T. Kondo, B. Bilgier, H. C. Kozer, Y. -W. Lui, K. Hatanaka
PHYSICAL REVIEW LETTERS 108 ( 26 ) 262501 2012.6
Joint Work
Publisher：AMER PHYSICAL SOC
A high-resolution measurement of inelastic proton scattering off Zr-90 near 0 degrees was performed at 295 MeV with a focus on a pronounced strength previously reported in the low-energy tail of giant dipole resonance. A forest of fine structure was observed in the excitation energy region 7-12 MeV. A multipole decomposition analysis of the angular distribution for the forest was carried out using the ECIS95 distorted-wave Born approximation code with the Hartree-Fock plus random-phase approximation model of E1 and M1 transition densities and inclusion of E1 Coulomb excitation. The analysis separated pygmy dipole and M1 resonances in the forest at E-PDR 9.15 +/- 0.18 MeV with Gamma(PDR) = 2.91 +/- 0.64 MeV and at E-M1 = 9.53 +/- 0.06 MeV with Gamma(M1) = 2.70 +/- 0.17 MeV in the Lorentzian function, respectively. The B(E1) up arrow value for pygmy dipole resonance over 7-11 MeV is 0.75 +/- 0.08 e(2) fm(2), which corresponds to 2.1 +/- 0: 2% of the Thomas-Reiche-Kuhn sum rule.
DOI： 10.1103/PhysRevLett.108.262501
Other Link： http://orcid.org/0000-0001-5237-5718
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Consistent analysis of the 2+ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering Reviewed
M.Freer, M.Itoh, T.Kawabata, H.Fujita, H.Akimune, Z.Buthelezi, J.Carter, R.W.Fearick, S.V.Fortsch, M.Fujiwara, U.Garg, N.Hashimoto, K.Kawase, S.Kishi, T.Murakami, K.Nakanishi, Y.Nakatsugawa, B.K.Nayak, R.Neveling, S.Okumura, S.M.Perez, P.Papka, H.Sakaguchi, Y.Sasamoto, F.D.Smit, J.A.Swartz, H.Takeda, S.Terashima, M.Uchida, I.Usman, Y.Yasuda, M.Yosoi, J.Zenihiro
Phys. Rev. C 86 034320 2012
Joint Work
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Separation of Pygmy Dipole and M1 Resonances in 90Zr by a High-Resolution Inelastic Proton Scattering Near 0 degrees Reviewed
C.Iwamoto, H.Utsunomiya, A.Tamii, H.Akimune, H.Nakada, T.Shima, T.Yamagata, T.Kawabata, Y.Fujita, H.Matsubara, Y.Shimbara, M.Nagashima, T.Suzuki, H.Fujita, M.Sakuda, T.Mori, T.Izumi, A.Okamoto, T.Kondo, B.Bilgier, H.C.Kozer, Y.-W.Lui, K.Hatanaka
Phys. Rev. Lett. 108 262501 2012
Joint Work
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Total and partial photoneutron cross sections for Pb isotopes Reviewed
T.Kondo, H.Utsunomiya, S.Goriely, I.Daoutidis, C.Iwamoto, H.Akimune, A.Okamoto, T.Yamagata, M.Kamata, O.Itoh, H.Toyokawa, Y.-W.Lui, H.Harada, F.Kitatani, S.Hilaire, A.J.Koning
Phys. Rev. C 86 014316 2012
Joint Work
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Giant monopole resonance in even-A Cd isotopes, the asymmetry term in nuclear incompressibility, and the "softness" of Sn and Cd nuclei Reviewed
D.Patel, U.Garg, M.Fujiwara, H.Akimune, G.P.A.Berg, M.N.Harakeh, M.Itoh, T.Kawabata, K.Kawase, B.K.Nayak, T.Ohta, H.Ouchi, J.Piekarewicz, M.Uchida, H.P.Yoshida, M.Yosoi
Phys. Lett. B 718 447 2012
Joint Work
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High resolution (3He, t)experiment on the double-β decaying nuclei 128Te and 130Te Reviewed
P.Puppe, A.Lennarz, T.Adachi, H.Akimune, H.Ejiri, D.Frekers, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, E.-W.Grewe, K.Hatanaka, R.Hodak, C.Iwamoto, N.T.Khai, A.Okamoto, H.Okamura, P.P.Povinec, G.Susoy, T.Suzuki, A.Tamii, J.H.Thies, M.Yosoi
Phys. Rev. C 86 044603 2012
Joint Work
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The Ga-71(He-3, t) reaction and the low-energy neutrino response
D. Frekers, H. Ejiri, H. Akimune, T. Adachi, B. Bilgier, B. A. Brown, B. T. Cleveland, H. Fujita, Y. Fujita, M. Fujiwara, E. Ganioglu, V. N. Gavrin, E. -W. Grewe, C. J. Guess, M. N. Harakeh, K. Hatanaka, R. Hodak, M. Holl, C. Iwamoto, N. T. Khai, H. C. Kozer, A. Lennarz, A. Okamoto, H. Okamura, P. P. Povinec, P. Puppe, F. Simkovic, G. Susoy, T. Suzuki, A. Tamii, J. H. Thies, J. Van de Walle, R. G. T. Zegers
PHYSICS LETTERS B 706 ( 2-3 ) 134 - 138 2011.12
Joint Work
Publisher：ELSEVIER SCIENCE BV
A Ga-71(He-3,t)Ge-71 charge-exchange experiment was performed to extract with high precision the Gamow-Teller (GT) transition strengths to the three lowest-lying states in Ge-71, i.e., the ground state (1/2(-)), the 175 keV (5/2(-)) and the 500 key (3/2(-)) excited states. These are the relevant states, which are populated via a charged-current reaction induced by neutrinos from reactor-produced Cr-51 and Ar-37 sources. A precise measurement of the GT transition strengths is an important input into the calibration of the SAGE and GALLEX solar neutrino detectors and addresses a long-standing discrepancy between the measured and evaluated capture rates from the Cr-51 and Ar-37 neutrino calibration sources, which has recently spawned new ideas about unconventional neutrino properties. (C) 2011 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2011.10.061
Other Link： http://orcid.org/0000-0001-5237-5718
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Photoneutron cross sections for Sn118-124 and the gamma-ray strength function method
H. Utsunomiya, S. Goriely, M. Kamata, H. Akimune, T. Kondo, O. Itoh, C. Iwamoto, T. Yamagata, H. Toyokawa, Y. -W. Lui, H. Harada, F. Kitatani, S. Goko, S. Hilaire, A. J. Koning
PHYSICAL REVIEW C 84 ( 5 ) 55805 2011.11
Joint Work
Publisher：AMER PHYSICAL SOC
Photoneutron cross sections were measured for Sn-118, Sn-119, Sn-120, Sn-122, and Sn-124 near neutron threshold with quasi-monochromatic laser-Compton scattering gamma rays. A systematic analysis of the present photoneutron data and existing neutron-capture data is made using the gamma-ray strength function on the basis of the HFB + QRPA model of E1 strength supplemented with a pygmy dipole resonance, which was deduced from a previous study on Sn-116 and Sn-117. Radiative neutron capture cross sections for two radioactive nuclei, Sn-121 and Sn-123, are deduced through the gamma-ray strength function method.
DOI： 10.1103/PhysRevC.84.055805
Other Link： http://orcid.org/0000-0001-5237-5718
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The gamma SF Method - Determination of Radiative Neutron Capture Cross Sections for Unstable Nuclei
H. Utsunomiya, S. Goriely, H. Akimune, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, Y. -W. Lui
JOURNAL OF THE KOREAN PHYSICAL SOCIETY 59 ( 2 ) 1713 - 1716 2011.8
Joint Work
Publisher：KOREAN PHYSICAL SOC
An indirect method of determining radiative neutron-capture cross sections for unstable nuclei which we refer to as the gamma-ray strength function (gamma SF) method is outlined and applied to Zr and Sn isotopes. Photoneutron cross sections for Zr-91,Zr-92,Zr-94,Zr-96 and Sn-117,Sn-116 near neutron threshold show the presence of extra gamma-ray strengths known as giant M1 and pygmy E1 resonances on top of the low-energy gamma SF of GDR. Based on the gamma SF method, we present (n,gamma) cross sections for two radioactive nuclei, a long-lived fission product, Zr-93 with T-1/2= 1.5 x 10(6) y and an s-process branching point nucleus, Zr-95 with T-1/2 = 64.0 d.
DOI： 10.3938/jkps.59.1713
Other Link： http://orcid.org/0000-0001-5237-5718
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Measurement of Se-76 and Se-78 (gamma, n) Cross Sections
Fumito Kitatani, Hideo Harada, Shinji Goko, Hiroaki Utsunomiya, Hidetoshi Akimune, Hiroyuki Toyokawa, Kawakatsu Yamada
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 48 ( 7 ) 1017 - 1024 2011.7
Joint Work
Publisher：TAYLOR & FRANCIS LTD
The (gamma, n) cross sections of Se isotopes (Se-76,Se-78) were measured to supply fundamental data for estimating the inverse reaction cross section, i.e., the Se-79(n, gamma)Se-80 cross section. The enriched samples and a reference Au-197 sample were irradiated with laser-Compton scattering (LCS) gamma-rays. The excitation function of each (gamma, n) cross section was determined for the energy range from each near neutron separation energy to the threshold energy of (gamma, 2n) reaction. The energy point corresponding to each cross section was deduced using the accurately determined energy distribution of LCS gamma-rays. Systematic (gamma, n) cross sections for Se isotopes including 80Se were compared with those calculated by using a statistical model calculation code TALYS.
DOI： 10.1080/18811248.2011.9711787
Other Link： http://orcid.org/0000-0001-5237-5718
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Osamu Itoh, Hiroaki Utsunomiya, Hidetoshi Akimune, Takeo Kondo, Masaki Kamata, Tamio Yamagata, Hiroyuki Toyokawa, Hideo Harada, Fumito Kitatani, Shinji Goko, Chithra Nair, Yiu-Wing Lui
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 48 ( 5 ) 834 - 840 2011.5
Joint Work
Publisher：TAYLOR & FRANCIS LTD
Photoneutron cross section measurements were made for Au in the entire energy range of the (gamma,n) channel based on a direct neutron counting with quasi-monochromatic gamma-rays produced in inverse Compton scattering of laser photons with relativistic electrons. The data were analyzed by a least-squares method to deduce photoneutron cross sections. The analysis significantly reduced experimental uncertainties compared with those resulting from the photon difference method. The result is compared with the previous data by direct neutron counting with gamma-rays produced in positron annihilation in flight and by photoactivation with bremsstrahlung. The present data are in good agreement with the previous data near the neutron threshold, while there remain some discrepancies between the present and the previous data above 10 MeV.
DOI： 10.1080/18811248.2011.9711766
Other Link： http://orcid.org/0000-0001-5237-5718
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Photoneutron cross sections for 118-124Sn and the γ-ray strength function method Reviewed
H.Utsunomiya, S.Goriely, M.Kamata, H.Akimune, T.Kondo, O.Itoh, C.Iwamoto, T.Yamagata, H.Toyokawa, Y.-W.Lui, H.Harada, F.Kitatani, S.Goko, S.Hilaire, A.J.Koning
Phys. Rec. C 84 055805 2011
Joint Work
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The 71Ga(3He, t) reaction and the low-energy neutrino response Reviewed
D.Frekers, H.Ejiri, H.Akimune, T.Adachi, B.Bilgier, B.A.Brown, B.T.Cleveland, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, V.N.Gavrin, E.-W.Grewe, C.J.Guess, M.N.Harakeh, K.Hatanaka, R.Hodak, M.Holl, C.Iwamoto, N.T.Khai, H.C.Kozer, A.Lennarz, A.Okamoto, H.Okamura, P.P.Povinec, P.Puppe, F.Simkovic, G.Susoy, T.Suzuki, A.Tamii, J.H.Thies, J.Van de Walle, R.G.T.Zegers
Phys. Lett. B 706 134 2011
Joint Work
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The 150Nd(3He, t) and 150Sm(t, 3He) reactions with applications to ββ decay of 150Nd Reviewed
C.J.Guess, T.Adachi, H.Akimune, A.Algora, S.M.Austin, D.Bazin, B.A.Brown, C.Caesar, J.M.Deaven, H.Ejiri, E.Estevez, D.Fang, A.Faessler, D.Frekers, H.Fujita, Y.Fujita, M.Fujiwara, G.F.Grinyer, M.N.Harakeh, K.Hatanaka, C.Herlitzius, K.Hirota, G.W.Hitt, D.Ishikawa, H.Matsubara, R.Meharchand, F.Molina, H.Okamura, H.J.Ong, G.Perdikakis, V.Rodin, B.Rubio, Y.Shimbara, G.Susoy, T.Suzuki, A.Tamii, J.H.Thies, C.Tur, N.Verhanovitz, M.Yosoi, J.Yurkon, R.G.T.Zegers, J.Zenihiro
Phys. Rev. C 83 064318 2011
Joint Work
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Candidate for the 2+ excited Hoyle state at Ex ∼ 10 MeV in 12C Reviewed
M.Itoh, H.Akimune, M.Fujiwara, U.Garg, N.Hashimoto, T.Kawabata, K.Kawase, S.Kishi, T.Murakami, K.Nakanishi, Y.Nakatsugawa, B.K.Nayak, S.Okumura, H.Sakaguchi, H.Takeda, S.Terashima, M.Uchida, Y.Yasuda, M.Yosoi, J.Zenihiro
Phys. Rev. C 84 054308 2011
Joint Work
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High-resolution (3He, t) reaction on the double-β decaying nucleus 136Xe Reviewed
P.Puppe, D.Frekers, T.Adachi, H.Akimune, N.Aoi, B.Bilgier, H.Ejiri, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, M.N.Harakeh, K.Hatanaka, M.Holl, H.C.Kozer, J.Lee, A.Lennarz, H.Matsubara, K.Miki, S.E.A.Orrigo, T.Suzuki, A.Tamii, J.H.Thies
Phys. Rev. C 83 051305 2011
Joint Work
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Application of the γSF method to palladium
Utsunomiya H, Goriely S, Arteaga D.P, Daoutidis I, Akimune H, Yamagata T, Kondo T, Iwamoto C, Kamata M, Itoh O, Harada H, Kitatani F, Goko S, Toyokawa H, Yamada K, Lui Y.-W, Hilaire S, Koning A.J.
AIP Conference Proceedings 1377 450 - 452 2011
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Yamamoto T, Akimune H, Fujii T, Fukushima M, Iijima N, Kuramoto K, Ogio S, Sagawa H, Sakurai N.
Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011 3 227 - 230 2011
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Determination of the number of pulsed laser-Compton scattering photons
Kondo T, Utsunomiya H, Akimune H, Yamagata T, Okamoto A, Harada H, Kitatani F, Shima T, Horikawa K, Miyamoto S.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 659 ( 1 ) 462 - 466 2011
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Candidate for the 2+ excited Hoyle state at Ex _ 10 MeV in 12C
M.Itoh, H.Akimune, M.Fujiwara, U.Garg, N.Hashimoto, T.Kawabata, K.Kawase, S.Kishi, T.Murakami, K.Nakanishi, Y.Nakatsugawa, B.K.Nayak, S.Okumura, H.Sakaguchi, H.Takeda, S.Terashima, M.Uchida, Y.Yasuda, M.Yosoi, J.Zenihiro
Phys. Rev. C 84 ( 5 ) 54308 2011
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Measurement of (γ,n) cross sections of Se isotopes using laser-compton scattering γ-rays
Kitatani F, Goko S, Harada H, Usunomiya H, Akimune H, Toyokawa H, Yamada K.
Journal of the Korean Physical Society 59 ( 23 ) 1836 - 1839 2011
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Fujiwara M, Li T, Patel D, Garg U, Berg G.P.A, Liu Y, Marks R, Matta J, Nayak B.K, Madhusudhana-Rao P.V, Long A, Sault K, Talwar R, Hashimoto H, Nakanishi K, Okumura S, Yosoi M, Ichikawa M, Itoh M, Matsuo R, Terazono T, Uchida M, Iwao Y, Kawabata T, Murakami T, Sakaguchi H, Terashima S, Yasuda Y, Zenihiro J, Akimune H, Iwamoto C, Okamoto A, Kawase K, Adachi T, Harakeh M.N.
AIP Conference Proceedings 1377 164 - 171 2011
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Kuramoto K, Ogio S, Yamamoto T, Iijima T, Akimune H, Fujii T, Fukushima M, Sagawa H, Sakurai N.
Proceedings of the 32nd International Cosmic Ray Conference, ICRC 2011 3 165 - 167 2011
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H. Utsunomiya, S. Goriely, H. Akimune, T. Yamagata, T. Kondo, C. Iwamoto, A. Okamoto, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, Y-W. Lui, S. Hilaire, A. J. Koning
FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS (FINUSTAR 3) 1377 255 - 259 2011
Joint Work
Publisher：AMER INST PHYSICS
The gamma-ray strength function (gamma SF) interconnects radiative neutron capture and photoneutron emission as a common ingredient in the statistical model. Outlined here is an indirect method of determining radiative neutron-capture cross sections for unstable nuclei based gamma-ray strength function. Application examples of the gamma SF method are demonstrated.
DOI： 10.1063/1.3628388
Other Link： http://orcid.org/0000-0001-5237-5718
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The 150Nd(3He, t) and 150Sm(t, 3He) reactions with applications to ββ decay of 150Nd
C.J.Guess, T.Adachi, H.Akimune, A.Algora, S.M.Austin, D.Bazin, B.A.Brown, C.Caesar, J.M.Deaven, H.Ejiri, E.Estevez, D.Fang, A.Faessler, D.Frekers, H.Fujita, Y.Fujita, M.Fujiwara, G.F.Grinyer, M.N.Harakeh, K.Hatanaka, C.Herlitzius, K.Hirota, G.W.Hitt, D.Ishikawa, H.Matsubara, R.Meharchand, F.Molina, H.Okamura, H.J.Ong, G.Perdikakis, V.Rodin, B.Rubio, Y.Shimbara, G.Susoy, T.Suzuki, A.Tamii, J.H.Thies, C.Tur, N.Verhanovitz, M.Yosoi, J.Yurkon, R.G.T.Zegers, J.Zenihiro
Phys. Rev. C 83 ( 6 ) 64318 2011
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STRIKING BEHAVIOR OF PHOTONEUTRON CROSS SECTIONS FOR Zr-90 NEAR THRESHOLD
H. Utsunomiya, S. Goriely, H. Akimune, T. Yamagata, T. Kondo, C. Iwamoto, O. Itoh, M. Kamata, M. Io, K. Kususe, T. Teramoto, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, Y. -W. Lui
FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS (FINUSTAR 3) 1377 447 - 449 2011
Joint Work
Publisher：AMER INST PHYSICS
Photoneutron cross sections for Zr-90 near neutron threshold were examined with a photon difference technique using laser Compton scattering gamma-ray beams. The cross section decreasing in the vicinity of neutron threshold exhibited a steep rise within 150 keV above the threshold. We draw attention to a possible relation of this striking behavior to the 3P valence neutron resonance known in neutron capture in the mass region A approximate to 90.
DOI： 10.1063/1.3628441
Other Link： http://orcid.org/0000-0001-5237-5718
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PHOTONEUTRON CROSS SECTIONS FOR Au
O. Itoh, H. Utsunomiya, H. Akimune, T. Yamagata, T. Kondo, M. Kamata, H. Toyokawa, H. Harada, F. Kitatani, S. Goko, C. Nair, Y. -W. Lui
FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS (FINUSTAR 3) 1377 362 - 364 2011
Joint Work
Publisher：AMER INST PHYSICS
Photoneutron cross sections were measured for Au in the entire energy range of the (gamma,n) channel based on a direct neutron-counting technique with quasimonochromatic gamma rays produced in inverse Compton-scattering of laser photons with relativistic electrons. We present results of the measurement in comparison with the past data.
DOI： 10.1063/1.3628413
Other Link： http://orcid.org/0000-0001-5237-5718
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Measurement of 76Se and 78Se (γ, n) cross sections
Kitatani F, Harada H, Goko S, Utsunomiya H, Akimune H, Toyokawa H, Yamada K
Journal of Nuclear Science and Technology 48 ( 7 ) 1017 - 1024 2011
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High-resolution (3He, t) reaction on the double-β decaying nucleus 136Xe
P.Puppe, D.Frekers, T.Adachi, H.Akimune, N.Aoi, B.Bilgier, H.Ejiri, H.Fujita, Y.Fujita, M.Fujiwara, E.Ganioglu, M.N.Harakeh, K.Hatanaka, M.Holl, H.C.Kozer, J.Lee, A.Lennarz, H.Matsubara, K.Miki, S.E.A.Orrigo, T.Suzuki, A.Tamii, J.H.Thies
Phys. Rev. C 83 ( 5 ) 51305 2011
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gamma-ray strength function method and its application to Pd-107
H. Utsunomiya, S. Goriely, H. Akimune, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, T. Kondo, O. Itoh, M. Kamata, T. Yamagata, Y. -W. Lui, I. Daoutidis, D. P. Arteaga, S. Hilaire, A. J. Koning
PHYSICAL REVIEW C 82 ( 6 ) 64610 2010.12
Joint Work
Publisher：AMER PHYSICAL SOC
The gamma-ray strength function method is devised to indirectly determine radiative neutron capture cross sections for radioactive nuclei. This method is applied here to the Pd-107 (T-1/2 = 6.5 x 10(6) yr) case. Photoneutron cross sections were measured for Pd-105,Pd-106,Pd-108 near neutron threshold with quasimonochromatic laser-Compton-scattering gamma-ray beams. These photoneutron cross sections as well as the reverse radiative neutron capture cross sections for Pd-104,Pd-105 are used to provide constraints on the Pd-107(n,gamma)Pd-108 cross section.
DOI： 10.1103/PhysRevC.82.064610
Other Link： http://orcid.org/0000-0001-5237-5718
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Measurement of the $^{80}$Se($\gamma$, n) Cross Section Using Laser-Compton Scattering $\gamma$-Rays Reviewed
F. Kitatani, H. Harada, S. Goko, H. Utsunomiya, H. Akimune, T. Kaihori, H. Toyokawa, K. Yamada
J.Nucl.Sci.Technol.(Tokyo) 47 367 2010.11
Joint Work
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$\gamma$-ray strength function method and its application to $^{107}$Pd Reviewed
H. Utsunomiya, S. Goriely, H. Akimune, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, T. Kondo, O. Itoh, M. Kamata, T. Yamagata, Y. -W. Lui, I. Daoutidis, D. P. Arteaga, S. Hilaire, A. J. Koning
Phys.Rev. C 82 64610 2010.11
Joint Work
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Photoneutron cross sections for $^{96}$Zr: A systematic experimental study of photoneutron and radiative neutron capture cross sections for zirconium isotopes Reviewed
H. Utsunomiya, S. Goriely, H. Akimune, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, T. Kondo, O. Itoh, M. Kamata, T. Yamagata, Y. -W. Lui, S. Hilaire, A. J. Koning
Phys.Rev. C 81 35801 2010.11
Joint Work
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Proton inelastic scattering to the dilute $\alpha$-cluster condensed 0$^{+} _{2}$ state at E$_{x}$ = 7.654 MeV in $^{12}$C Reviewed
A. Okamoto, T. Yamagata, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, R. Hayami, K. Kawase, M. Kinoshita, K. Nakanishi, S. Nakayama, M. Tanaka, H. Utsunomiya, N. Warashina, M. Yosoi
Phys.Rev. C 81 54604 2010.11
Joint Work
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Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility Reviewed
T. Li, U. Garg, Y. Liu, R. Marks, B. K. Nayak, P. V. Madhusudhana Rao, M. Fujiwara, H. Hashimoto, K. Nakanishi, S. Okumura, M. Yosoi, M. Ichikawa, M. Itoh, R. Matsuo, T. Terazono, M. Uchida, Y. Iwao, T. Kawabata, T. Murakami, H. Sakaguchi, S. Terashima, Y. Yasuda, J. Zenihiro, H. Akimune, K. Kawase, M. N. Harakeh
Phys.Rev. C 81 34309 2010.11
Joint Work
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Proton inelastic scattering to the dilute α-cluster condensed 02+ state at Ex=7.654 MeV in C12
A. Okamoto, T. Yamagata, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, R. Hayami, K. Kawase, M. Kinoshita, K. Nakanishi, S. Nakayama, M. Tanaka, H. Utsunomiya, N. Warashina, M. Yosoi
Physical Review C - Nuclear Physics 81 ( 5 ) 54604 2010.5
Joint Work
Differential cross sections for the 02+ state at Ex=7.654 MeV in C12 were measured with the (p,p′) reaction at an incident energy of Ep=300 MeV, and in an angular range from θLab=2.7° to 40°. The cross-section data were compared with the distorted-wave Born-approximation calculations employing three types of transition densities obtained in a macroscopic collective model, a microscopic α-cluster model, and a microscopic α-cluster condensation model. It is concluded that the measured angular distribution of the differential cross sections for the C12(p,p′) reaction at 300 MeV is consistently described with the assumption that the 02+ state at Ex=7.654 MeV is the dilute α-cluster condensed state. © 2010 The American Physical Society.
DOI： 10.1103/PhysRevC.81.054604
Other Link： http://orcid.org/0000-0001-5237-5718
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T. Li, U. Garg, Y. Liu, R. Marks, B. K. Nayak, P. V. Madhusudhana Rao, M. Fujiwara, H. Hashimoto, K. Nakanishi, S. Okumura, M. Yosoi, M. Ichikawa, M. Itoh, R. Matsuo, T. Terazono, M. Uchida, Y. Iwao, T. Kawabata, T. Murakami, H. Sakaguchi, S. Terashima, Y. Yasuda, J. Zenihiro, H. Akimune, K. Kawase, M. N. Harakeh
Physical Review C - Nuclear Physics 81 ( 3 ) 34309 2010.3
Joint Work
We have investigated the isoscalar giant resonances in the Sn isotopes using inelastic scattering of 386-MeV α particles at extremely forward angles, including 0°. We have obtained completely "background-free" inelastic-scattering spectra for the Sn isotopes over the angular range 0°-9° and up to an excitation energy of 31.5 MeV. The strength distributions for various multipoles were extracted by a multipole decomposition analysis based on the expected angular distributions of the respective multipoles. We find that the centroid energies of the isoscalar giant monopole resonance (ISGMR) in the Sn isotopes are significantly lower than the theoretical predictions. In addition, based on the ISGMR results, a value of Kτ=-550±100 MeV is obtained for the asymmetry term in the nuclear incompressibility. Constraints on interactions employed in nuclear structure calculations are discussed on the basis of the experimentally obtained values for K and Kτ. © 2010 The American Physical Society.
DOI： 10.1103/PhysRevC.81.034309
Other Link： http://orcid.org/0000-0001-5237-5718
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H. Utsunomiya, S. Goriely, H. Akimune, H. Harada, F. Kitatani, S. Goko, H. Toyokawa, K. Yamada, T. Kondo, O. Itoh, M. Kamata, T. Yamagata, Y. -W. Lui, S. Hilaire, A. J. Koning
PHYSICAL REVIEW C 81 ( 3 ) 35801 2010.3
Joint Work
Publisher：AMER PHYSICAL SOC
Photoneutron cross sections were measured for Zr-96 near neutron threshold with quasimonochromatic laser-Compton-scattering. gamma-ray beams. A systematic analysis of photoneutron and radiative neutron capture data for zirconium isotopes within the statistical model calculation leads to a unified picture of low-energy gamma-ray strengths for zirconium isotopes that is described by the HFB + QRPA model of E1 strength supplemented with an extra gamma strength attributed to a giant M1 resonance. Results of the systematic analysis including radiative neutron capture cross sections for radioactive Zr-95 and Zr-93 nuclei are presented.
DOI： 10.1103/PhysRevC.81.035801
Other Link： http://orcid.org/0000-0001-5237-5718
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Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility Invited Reviewed
T.Li, U.Garg, Y.Liu, R.Marks, B.K.Nayak, P.V.Madhusudhana Rao, M.Fujiwara, H.Hashimoto, K.Nakanishi, S.Okumura, M.Yosoi, M.Ichikawa, M.Itoh, R.Matsuo, T.Terazono, M.Uchida, Y.Iwao, T.Kawabata, T.Murakami, H.Sakaguchi, S.Terashima, Y.Yasuda, J.Zenihiro, H.Akimune, K.Kawase, M.N.Harakeh
Phys. Rec. C 81 034309 2010
Joint Work
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Itoh O, Utsunomiya H, Akimune H, Yamagata T, Kamata M, Kondo T, Toyokawa H, Lui Y.-W, Kitatani F, Harada H, Goko S, Nair C.
AIP Conference Proceedings 1238 237 - 239 2010
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Okamoto A, Yamagata T, Akimune H, Fujiwara M, Fushimi K, Greenfield M.B, Hara K, Hara K.Y, Hashimoto H, Hayami R, Hirabayashi H, Kawase K, Kinoshita M, Nakanishi N, Nakayama S, Tanaka M, Utsunomiya H, Warashina N, Yosoi M.
AIP Conference Proceedings 1238 294 - 296 2010
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Near-threshold Λ(1520) production by the γ→p→K +Λ(1520) reaction at forward K+ angles
Kohri H, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fukui S, Fujimura H, Fujiwara M, Hasegawa S, Hicks K, Hosaka A, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Nam S.I, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu A, Shimizu H, Sugaya Y, Sumihama M, Titov A.I, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review Letters 104 ( 17 ) 2010
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Measurement of the incoherent γ d → φ{symbol} p n photoproduction near threshold
Chang W.C, Miyabe M, Nakano T, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Horie K, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyachi M, Muramatsu N, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Uchida M, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 684 ( 1 ) 6 - 10 2010
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Measurement of the 80se(γ, n) cross section using laser-compton scattering γ-rays
Kitatani F, Harada H, Goko S, Utsunomiya H, Akimune H, Kaihori T, Toyokawa H, Yamada K.
Journal of Nuclear Science and Technology 47 ( 4 ) 367 - 375 2010
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Chang W.C, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Horie K, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kumagai N, Lin P.J, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyabe M, Miyachi Y, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Uchida M, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review C - Nuclear Physics 82 ( 1 ) 2010
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M1 and E1 transition cross sections in D(γ, n) reactions near reaction threshold
Iwamoto C, Akimune H, Utsunomiya H, Yamagata T, Kondo T, Kamata M, Toyokawa H, Harano H, Matsumoto T, Lui Y.-W.
AIP Conference Proceedings 1238 301 - 303 2010
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Isovector dipole resonances in4He and neutrino-heating in supernova explosion
Nakayama S, Matsumoto E, Suzuki T, Yamagata T, Akimune H, Fujiwara M, Fushimi K, Greenfield M.B, Hashimoto H, Hayami R, Ikemizu H, Kawase K, Kudoh T, Nakanishi K, Oota T, Sagara K, Tanaka M, Yosoi M.
AIP Conference Proceedings 1269 336 - 338 2010
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Isovector dipole resonances in 4He and neutrino-heating in supernova
Nakayama S, Matsumoto E, Suzuki T, Yamagata T, Akimune H, Fujiwara M, Fushimi K, Greenfield M.B, Hashimoto H, Hayami R, Ikemizu H, Kawase K, Kudoh T, Nakarnshi K, Oota T, Sagara K, Tanaka M, Yosoi M.
AIP Conference Proceedings 1238 280 - 285 2010
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Extra γ-ray strength for 116,117Sn arising from pygmy dipole resonance
Kamata M, Utsunomiya H, Akimune H, Yamagata T, Itoh O, Iwamoto C, Kondo T, Toyokawa H, Lui Y.-W, Goriely S.
AIP Conference Proceedings 1238 234 - 236 2010
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Experimental study of nuclear astrophysics with photon beams
Shima T, Nagai Y, Miyamoto S, Amano S, Horikawa K, Mochizuki T, Utsunomiya H, Akimune H.
AIP Conference Proceedings 1235 315 - 321 2010
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Threshold photoneutron cross sections for Pb-208,Pb-207,Pb-206 isotopes
T. Kondo, H. Utsunomiya, H. Akimune, T. Yamagata, C. Iwamoto, M. Kamata, O. Itoh, H. Toyokawa, Y-W Lui
TOURS SYMPOSIUM ON NUCLEAR PHYSICS AND ASTROPHYSICS - VII 1238 231 - + 2010
Joint Work
Publisher：AMER INST PHYSICS
Photoneutron cross sections for three Pb isotopes (Pb-206, Pb-207, Pb-208) near neutron threshold were measured with the laser inverse-Compton scattering gamma rays at the National Institute of Advanced Industrial Science and Technology. The cross section data are presented.
DOI： 10.1063/1.3455937
Other Link： http://orcid.org/0000-0001-5237-5718
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Study of 12C(γ,2α)4He with NewSUBARU laser compton scattered gamma-ray beam
Shima T, Nagai Y, Miyamoto S, Amano S, Horikawa K, Mochizuki T, Utsunomiya H, Akimune H
AIP Conference Proceedings 1269 469 - 471 2010
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Evidence for theΘ+ in the γd → K+K- pn reaction by detecting K+K- pairs
秋宗 秀俊
T. Nakano et al. Phys. Rev. C 79, 025210 2009.11
Single Work
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Proton decay from the isoscalar giant dipole resonance in $^{58}$Ni Reviewed
M. Hunyadi, H. Hashimoto, T. Li, H. Akimune, H. Fujimura, M. Fujiwara, Z. Gacsi, U. Garg, K. Hara, M. N. Harakeh, J. Hoffman, M. Itoh, T. Murakami, K. Nakanishi, B. K. Nayak, S. Okumura, H. Sakaguchi, S. Terashima, M. Uchida, Y. Yasuda, M. Yosoi
Phys.Rev. C 80 44317 2009.11
Joint Work
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$\gamma$-ray strength function for $^{116, 117}$Sn with the pygmy dipole resonance balanced in the photoneutron and neutron capture channels Reviewed
H. Utsunomiya, S. Goriely, M. Kamata, T. Kondo, O. Itoh, H. Akimune, T. Yamagata, H. Toyokawa, Y. -W. Lui, S. Hilaire, A. J. Koning
Phys.Rev. C 80 55806 2009.11
Joint Work
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Direct proton decay of the isoscalar giant dipole resonance in $^{208}$Pb Reviewed
B. K. Nayak, U. Garg, M. Koss, T. Li, E. Martis, H. Fujimura, M. Fujiwara, K. Hara, K. Kawase, K. Nakanishi, E. Obayashi, H. P. Yoshida, M. Itoh, S. Kishi, H. Sakaguchi, H. Takeda, M. Uchida, Y. Yasuda, M. Yosoi, R. G. T. Zegers, H. Akimune, M. N. Harakeh, M. Hunyadi
Phys.Lett. B 674 281 2009.11
Joint Work
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Evidence for the$\Theta ^{+}$ in the $\gamma$d $\to$ K$^{+}$K$^{-}$ pn reaction by detecting K$^{+}$K$^{-}$ pairs Reviewed
T. Nakano, N. Muramatsu, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, H. Hasegawa, K. Hicks, K. Horie, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, Z. Y. Kim, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsuda, N. Matsuoka, T. Matsumura, T. Mibe, M. Miyabe, Y. Miyachi, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, P. M. Shagin, Y. Shiino, A. Shimizu, H. Shimizu, Y. Sugaya, M. Sumihama, Y. Toi, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G. T. Zegers
Phys.Rev. C 79 25210 2009.11
Joint Work
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Photodisintegration of $^{80}$Se: Implications for the s-process branching at $^{79}$Se Reviewed
A. Makinaga, H. Utsunomiya, S. Goriely, T. Kaihori, S. Goko, H. Akimune, T. Yamagata, H. Toyokawa, T. Matsumoto, H. Harano, H. Harada, F. Kitatani, Y. K. Hara, S. Hohara, Y. -W. Lui
Phys.Rev. C 79 25801 2009.11
Joint Work
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Photodisintegration of $^{80}$Se: Implications for the s-process branching at $^{79}$Se
A. Makinaga, H. Utsunomiya, S. Goriely, T. Kaihori, S. Goko, H. Akimune, T. Yamagata, H. Toyokawa, T. Matsumoto, H. Harano, H. Harada, F. Kitatani, Y. K. Hara, S. Hohara, Y. -W. Lui
Phys.Rev. C 79 ( 2 ) 25801 2009.11
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H. Utsunomiya, S. Goriely, M. Kamata, T. Kondo, O. Itoh, H. Akimune, T. Yamagata, H. Toyokawa, Y. -W. Lui, S. Hilaire, A. J. Koning
PHYSICAL REVIEW C 80 ( 5 ) 55806 2009.11
Joint Work
Publisher：AMER PHYSICAL SOC
Photoneutron cross sections were measured for Sn-117 and Sn-116 near the neutron thresholds at 6.94 and 9.56 MeV, respectively, with quasi-monochromatic laser-Compton scattering gamma rays. The Sn-117 cross section, which is strongly enhanced near the low threshold, provides evidence for the presence of extra gamma strength in the low-energy tail of the giant dipole resonance. A coherent analysis of the photoneutron data for Sn-117 together with the neutron capture on Sn-116 shows that the gamma-ray strength function is balanced in the photoneutron and neutron capture channels in terms of the microscopic Hartree-Fock-Bogoliubov plus quasiparticle random-phase approximation model of E1 strength combined with a pygmy E1 resonance at 8.5 MeV. The high-energy part of the pygmy resonance is also suggested in the photoneutron cross section for Sn-116.
DOI： 10.1103/PhysRevC.80.055806
Other Link： http://orcid.org/0000-0001-5237-5718
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Proton decay from the isoscalar giant dipole resonance in Ni-58
M. Hunyadi, H. Hashimoto, T. Li, H. Akimune, H. Fujimura, M. Fujiwara, Z. Gacsi, U. Garg, K. Hara, M. N. Harakeh, J. Hoffman, M. Itoh, T. Murakami, K. Nakanishi, B. K. Nayak, S. Okumura, H. Sakaguchi, S. Terashima, M. Uchida, Y. Yasuda, M. Yosoi
PHYSICAL REVIEW C 80 ( 4 ) 44317 2009.10
Joint Work
Publisher：AMER PHYSICAL SOC
Proton decay from the 3 (h) over bar omega isoscalar giant dipole resonance (ISGDR) in Ni-58 has been measured using the (alpha, alpha' p) reaction at a bombarding energy of 386 MeV to investigate its decay properties. We have extracted the ISGDR strength under the coincidence condition between inelastically scattered alpha particles at forward angles and decay protons emitted at backward angles. Branching ratios for proton decay to low-lying states of Co-57 have been determined, and the results compared with predictions of recent continuum-RPA calculations. The final-state spectra of protons decaying to the low-lying states in Co-57 were analyzed for a more detailed understanding of the structure of the ISGDR. It is found that there are differences in the structure of the ISGDR as a function of excitation energy.
DOI： 10.1103/PhysRevC.80.044317
Other Link： http://orcid.org/0000-0001-5237-5718
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Direct proton decay of the isoscalar giant dipole resonance in 208Pb
B. K. Nayak, U. Garg, M. Koss, T. Li, E. Martis, H. Fujimura, M. Fujiwara, K. Hara, K. Kawase, K. Nakanishi, E. Obayashi, H. P. Yoshida, M. Itoh, S. Kishi, H. Sakaguchi, H. Takeda, M. Uchida, Y. Yasuda, M. Yosoi, R. G.T. Zegers, H. Akimune, M. N. Harakeh, M. Hunyadi
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 674 ( 4-5 ) 281 - 285 2009.4
Joint Work
The excitation and subsequent proton decay of the isoscalar giant dipole resonance (ISGDR) in 208Pb have been investigated via the 208Pb (α, α′ p) 207Tl reaction at 400 MeV. Excitation of the ISGDR has been identified by the difference-of-spectra method. The enhancement of the ISGDR strength at high excitation energies observed in the multipole-decomposition-analysis of the singles 208Pb (α, α′) spectra is not present in the excitation energy spectrum obtained in coincidence measurement. The partial branching ratios for direct proton decay of ISGDR to low-lying states of 207Tl have been determined and the results are compared with predictions of continuum random-phase-approximation (CRPA) calculations. © 2009 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2009.03.047
Other Link： http://orcid.org/0000-0001-5237-5718
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Evidence for the Theta(+) in the gamma d -> K(+)K(-)pn reaction by detecting K+K- pairs
T. Nakano, N. Muramatsu, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, H. Hasegawa, K. Hicks, K. Horie, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, Z. Y. Kim, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsuda, N. Matsuoka, T. Matsumura, T. Mibe, M. Miyabe, Y. Miyachi, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, P. M. Shagin, Y. Shiino, A. Shimizu, H. Shimizu, Y. Sugaya, M. Sumihama, Y. Toi, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G. T. Zegers
PHYSICAL REVIEW C 79 ( 2 ) 25210 2009.2
Joint Work
Publisher：AMER PHYSICAL SOC
The gamma d -> K(+)K(-)pn reaction has been studied to search for the evidence of the Theta(+) by detecting K+K- pairs at forward angles. The Fermi-motion-corrected nK(+) invariant mass distribution shows a narrow peak at 1.524 +/- 0.002+0.003 GeV/c(2). The statistical significance of the peak calculated from a shape analysis is 5.1 sigma, and the differential cross section for the gamma n -> K-Theta(+) reaction is estimated to be 12 +/- 2 nb/sr in the photon energy range from 2.0 to 2.4 GeV in the LEPS angular range by assuming the isotropic production of the Theta(+) in the gamma n center-of-mass system. The obtained results support the existence of the Theta(+).
DOI： 10.1103/PhysRevC.79.025210
Other Link： http://orcid.org/0000-0001-5237-5718
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Cross sections and beam asymmetry for K+Σ*- photoproduction from the deuteron at Eγ=1.5-2.4GeV
Hicks K, Keller D, Kohri H, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fukui S, Fujimura H, Fujiwara M, Hasegawa S, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kim Z.Y, Kino K, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Oh Y, Ohashi Y, Ohkuma H, Ooba T, Parker J, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu A, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review Letters 102 ( 1 ) 2009
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Backward-angle η photoproduction from protons at Eγ=1.6-2.4
Sumihama M, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kumagai N, Matsuda T, Matsumura T, Mibe T, Miyabe M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Shagin P.M, Shiino Y, Shimizu A, Shimizu H, Sugaya Y, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review C - Nuclear Physics 80 ( 5 ) 2009
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Low-lying strength in Sn photoneutron reactions
Utsunomiya H, Goriely S, Kamata M, Itoh O, Akimune H, Yamagata T, Toyokawa H, Hilaire S, Koning A.J.
AIP Conference Proceedings 1090 637 - 638 2009
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Near-threshold photoproduction of Λ(1520) from protons and deuterons
Muramatsu N, Chen J.Y, Chang W.C, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Horie K, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyabe M, Miyachi M, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review Letters 103 ( 1 ) 2009
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The γ-ray strength function in nuclear astrophysics
Utsunomiya H, Akimune H, Yamagata T, Kondo T, Kamata M, Itoh O, Toyokawa H, Yamada K, Matsumoto T, Harada H, Kitatani F, Goko S, Goriely S, Hilaire S, Koning A.J
AIP Conference Proceedings 1120 183 - 188 2009
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Analogs of the giant dipole and spin-dipole resonances in $^{4}$He and in $\alpha$ clusters of $^{6, 7}$Li studied by the $^{4}$He, $^{6, 7}$Li($^{7}$Li, $^{7}$Be$\gamma$) reactions Reviewed
S. Nakayama, T. Yamagata, E. Matsumoto, H. Akimune, S. Asaji, M. Fujiwara, K. Fushimi, M. B. Greenfield, H. Hashimoto, R. Hayami, H. Ikemizu, T. Ishida, K. Kawase, H. Kawasuso, T. Kudoh, K. Nakanishi, T. Oota, K. Sagara, M. Tanaka, K. Yasuda, M. Yosoi
Phys.Rev. C 78 14303 2008.11
Joint Work
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Gamow-Teller strength for the analog transitions to the first T = 1 / 2, J$^{\pi}$ = 3 / 2$^{-}$ states in $^{13}$C and $^{13}$N and the implications for type Ia supernovae Reviewed
R. G. T. Zegers, E. F. Brown, H. Akimune, Sam M. Austin, A. M. van den Berg, B. A. Brown, D. A. Chamulak, Y. Fujita, M. Fujiwara, S. Gales, M. N. Harakeh, H. Hashimoto, R. Hayami, G. W. Hitt, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, K. Nakanishi, S. Nakayama, S. Okumura, Y. Shimbara, M. Uchida, H. Ueno, T. Yamagata, M. Yosoi
Phys.Rev. C 77 24307 2008.11
Joint Work
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Evidence for charged-particle decay of dipole-excited $^{4}$H clusters embedded in $^{6}$He and $^{7}$He Reviewed
T. Yamagata, H. Akimune, S. Nakayama, Y. Banshou, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, H. Ikemizu, K. Kawase, M. Kinoshita, K. Nakanishi, M. Ohta, M. Sakama, M. Tanaka, H. Utsunomiya, N. Warashina, M. Yosoi
Phys.Rev. C 77 21303 2008.11
Joint Work
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M1 $\gamma$ Strength for Zirconium Nuclei in the Photoneuton Channel Reviewed
H. Utsunomiya, S. Goriely, T. Kondo, T. Kaihori, A. Makinaga, S. Goko, H. Akimune, T. Yamagata, H. Toyokawa, T. Matsumoto, H. Harano, S. Hohara, Y. -W. Liu, S. Hilaire, S. Peru, A. J. Koning
Phys.Rev.Lett. 100 162502 2008.11
Joint Work
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Wolfenstein parameters for s$_{1 / 2}$ proton knockout (p, 2p) reactions Reviewed
T. Noro, M. Kawabata, G. C. Hillhouse, S. Akimune, H. Akiyoshi, I. Daito, K. Hatanaka, M. Itoh, Y. Maeda, N. Matsuoka, S. Morinobu, M. Nakamura, A. Okihana, H. Sagara, H. Sakaguchi, K. Takahisa, H. Takeda, A. Tamii, K. Tamura, H. Toyokawa, H. Yamazaki, H. P. Yoshida, M. Yosoi
Phys.Rev. C 77 44604 2008.11
Joint Work
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T. Yamagata, H. Akimune, S. Nakayama, Y. Banshou, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, H. Ikemizu, K. Kawase, M. Kinoshita, K. Nakanishi, M. Ohta, M. Sakama, M. Tanaka, H. Utsunomiya, N. Warashina, M. Yosoi
Phys.Rev. C 77 ( 2 ) 21303 2008.11
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S. Nakayama, T. Yamagata, E. Matsumoto, H. Akimune, S. Asaji, M. Fujiwara, K. Fushimi, M. B. Greenfield, H. Hashimoto, R. Hayami, H. Ikemizu, T. Ishida, K. Kawase, H. Kawasuso, T. Kudoh, K. Nakanishi, T. Oota, K. Sagara, M. Tanaka, K. Yasuda, M. Yosoi
Physical Review C - Nuclear Physics 78 ( 1 ) 14303 2008.7
Joint Work
We studied analogs of the giant dipole resonance (GDR) and spin-dipole resonance (SDR) in He4 and in the α clusters of Li6,7 via the (Li7,Be7γ) reactions on He4, Li6, and Li7 at an incident energy of 455 MeV and at a scattering angle of 0°by measuring spin-nonflip and spin-flip spectra. The reaction Q-values for the analogs of the GDR and SDR in the α clusters of Li6,7 were found to be more negative than those in He4 by 2.0±0.5 MeV. The ratios of the cross section for the analog of the GDR to that for the analog of the SDR in He4 and in the α clusters of Li6 and Li7 were found to be the same within errors, 0.5±0.1. The cross sections for the analogs of the GDR as well as those for the analogs of the SDR in the α clusters of Li6,7 were 0.6∼0.8 times smaller than those in He4. These results suggest that excitations of α clusters embedded in nuclei are suppressed as compared with excitations of free α particles. © 2008 The American Physical Society.
DOI： 10.1103/PhysRevC.78.014303
Other Link： http://orcid.org/0000-0001-5237-5718
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The second 2+ state at Ex = 10 MeV in 12C Reviewed
M. Itoh, H. Akimune, M.Fujiwara, U. Garg, H. Hashimoto, T. Kawabata, K. Kawase, S. Kishi, T. Murakami, K. Nakanishi, Y. Nakatsugawa, B.K. Nayak, S. Okumura, H. Sakaguchi, H. Takeda, S. Terashima, M. Uchida, Y. Yasuda, M. Yosoi, J. Zenihiro
Nuclear Physics A 805 371 - 373 2008.6
Joint Work
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M1 gamma strength for zirconium nuclei in the photoneutron channel
H. Utsunomiya, S. Goriely, T. Kondo, T. Kaihori, A. Makinaga, S. Goko, H. Akimune, T. Yamagata, H. Toyokawa, T. Matsumoto, H. Harano, S. Hohara, Y. -W. Lui, S. Hilaire, S. Peru, A. J. Koning
PHYSICAL REVIEW LETTERS 100 ( 16 ) 162502 2008.4
Joint Work
Publisher：AMER PHYSICAL SOC
Photoneutron cross sections were measured for Zr-91, Zr-92, and Zr-94 near the neutron separation energy with quasimonochromatic gamma rays. The data exhibit some extra components around the neutron threshold. A coherent analysis of the photoneutron data for Zr-92 together with the neutron capture on Zr-91 based on the microscopic Hartree-Fock-Bogoliubov plus quasiparticle random-phase approximation model for the E1 strength has revealed the presence of an M1 resonance at 9 MeV. The microscopic approach systematically shows the same M1 strength in the photoneutron cross section for Zr-91 and Zr-94. The total M1 strength is about 75% larger than the strength predicted by the systematics, being qualitatively consistent with the giant M1 resonance observed in the inelastic proton scattering.
DOI： 10.1103/PhysRevLett.100.162502
Other Link： http://orcid.org/0000-0001-5237-5718
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Wolfenstein parameters for s(1/2) proton knockout (p,2p) reactions
T. Noro, M. Kawabata, G. C. Hillhouse, S. Akimune, H. Akiyoshi, I. Daito, K. Hatanaka, M. Itoh, Y. Maeda, N. Matsuoka, S. Morinobu, M. Nakamura, A. Okihana, H. Sagara, H. Sakaguchi, K. Takahisa, H. Takeda, A. Tamii, K. Tamura, H. Toyokawa, H. Yamazaki, H. P. Yoshida, M. Yosoi
PHYSICAL REVIEW C 77 ( 4 ) 44604 2008.4
Joint Work
Publisher：AMER PHYSICAL SOC
A complete set of Wolfenstein parameters (D-i(') j), induced polarizations (P), and analyzing powers (A(y)) have been measured for (p,2p) reactions on Li-6, C-12, and Ca-40 targets in order to investigate possible nuclear medium effects on the nucleon-nucleon (NN) interaction. Most of these observables show significant reductions from the values for proton-proton scattering as monotonic functions of the nuclear density relevant to these reactions. The reductions of these D(i)(')j are reasonably reproduced by nonrelativistic plane-wave and distorted-wave calculations based on the impulse approximation, demonstrating that these suppressions are attributed to changes of the two body kinematics due to the finite separation energies of these reactions, while the reductions of A(y) and P are much more prominent than the calculations. The relativistic calculations, which partly explain the A(y) and P reductions, cannot reproduce the D(i)(')j data, but all the data are consistently reproduced when the parameters of the NN interaction in a meson exchange model are renormalized, suggesting possible modifications of the NN interaction by the surrounding nuclear medium.
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Utsunomiya H, Goriely S, Koning A.J, Hilaire S, Goko S, Makinaga A, Kaihori T, Kondo T, Yamagata T, Akimune H, Toyokawa H, Matsumoto T, Harano H, Lui Y.-W.
AIP Conference Proceedings 1012 173 - 178 2008
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Atomic charge exchange between semi-relativistic helium ions and targets from carbon to lead
Meharchand R, Akimune H, Van Den Berg A.M, Fujita Y, Fujiwara M, Gal{\'e}s S, Harakeh M.N, Hashimoto H, Hayami R, Hitt G.W, Itoh M, Kawabata T, Kawase K, Kinoshita M, Nakanishi K, Nakayama S, Okumura S, Shimbara Y, Uchida M, Yamagata T, Yosoi M, Zegers R.G.T.
Proceedings of Science 2008
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80 Se (γ, n) 79 Se cross section and s-process branching at 79 Se
Makinaga A, Utsunomiya H, Kaihori T, Yamagata T, Akimune H, Goriely S, Toyokawa H, Matsumoto T, Harano H, Harada H, Goko S, Kitatani F, Hara K.Y, Hohara S, Lui Y.-W.
AIP Conference Proceedings 1016 134 - 139 2008
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Akimune H, Ejiri H, Fujiwara M.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 665 ( 5 ) 424 2008
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Zegers R.G.T, Brown E.F, Akimune H, Austin S.M, Van Den Berg A.M, Brown B.A, Chamulak D.A, Fujita Y, Fujiwara M, Gal{\`e}s S, Harakeh M.N, Hashimoto H, Hayami R, Hitt G.W, Itoh M, Kawabata T, Kawase K, Kinoshita M, Nakanishi K, Nakayama S, Okumura S, Shimbara Y, Uchida M, Ueno H, Yamagata T, Yosoi M.
Physical Review C - Nuclear Physics 77 ( 2 ) 2008
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Forward coherent φ{symbol}-meson photoproduction from deuterons near threshold
Chang W.C, Horie K, Shimizu S, Miyabe M, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Dat{\'e} S, Ejiri H, Fukui S, Fujimura H, Fujiwara M, Hasegawa S, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Lin P.J, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu A, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 658 ( 5 ) 209 - 215 2008
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Experimental study of photonuclear reactions of light nuclei with NewSUBARU γ-ray Beam
Shima T, Nagai Y, Utsunomiya H, Akimune H, Miyamoto S, Horikawa K, Mochizuki T.
Proceedings of Science 2008
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Akimune H, Banshou Y, Ikemizu H, Kinoshita M, Ohta M, Utsunomiya H, Warashina N, Yamagata T, Nakayama S, Fushimi K, Fujiwara M, Kawase K, Yosoi M, Tanaka M, Greenfiled M.B.
Journal of Physics: Conference Series 111 ( 1 ) 2008
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Analog of the giant dipole resonance in $^{4}$He Reviewed
S. Nakayama, E. Matsumoto, R. Hayami, K. Fushimi, H. Kawasuso, K. Yasuda, T. Yamagata, H. Akimune, H. Ikemizu, M. Fujiwara, M. Yosoi, K. Nakanishi, K. Kawase, H. Hashimoto, T. Oota, K. Sagara, T. Kudoh, S. Asaji, T. Ishida, M. Tanaka, M. B. Greenfield
Phys.Rev. C 76 21305 2007.11
Joint Work
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2$\alpha$ + t cluster structure in $^{11}$B Reviewed
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-Enyo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
Phys.Lett. B 646 6 2007.11
Joint Work
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Three-body cluster state in $^{11}$B Reviewed
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-Enyo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
Nucl.Phys. A790 290c 2007.11
Joint Work
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Dilute 2$\alpha$ + t cluster structure in $^{11}$B Reviewed
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-En'yo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
Nucl.Phys. A788 301c 2007.11
Joint Work
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Isotopic Dependence of the Giant Monopole Resonance in the Even-A $^{112-124}$Sn Isotopes and the Asymmetry Term in Nuclear Incompressibility Reviewed
T. Li, U. Garg, Y. Liu, R. Marks, B. K. Nayak, P. V. Madhusudhana Rao, M. Fujiwara, H. Hashimoto, K. Kawase, K. Nakanishi, S. Okumura, M. Yosoi, M. Itoh, M. Ichikawa, R. Matsuo, T. Terazono, M. Uchida, T. Kawabata, H. Akimune, Y. Iwao, T. Murakami, H. Sakaguchi, S. Terashima, Y. Yasuda, J. Zenihiro, M. N. Harakeh
Phys.Rev.Lett. 99 162503 2007.11
Joint Work
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Atomic charge-exchange between semi-relativistic ($\nu$ / c = 0.49) helium ions and targets from carbon to lead Reviewed
R. Meharchand, H. Akimune, A. M. van den Berg, Y. Fujita, M. Fujiwara, S. Gales, M. N. Harakeh, H. Hashimoto, R. Hayami, G. W. Hitt, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, K. Nakanishi, S. Nakayama, S. Okumura, Y. Shimbara, M. Uchida, T. Yamagata, M. Yosoi, R. G. T. Zegers
Nucl.Instrum.Methods Phys.Res. B264 221 2007.11
Joint Work
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The Giant Monopole Resonance in the Sn Isotopes: Why is Tin so "Fluffy"?
秋宗 秀俊
Nucl.Phys. A788, 36c 2007.11
Joint Work
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2α + t cluster structure in 11B
秋宗 秀俊
Phys.Lett. B 646, 6 2007.11
Joint Work
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Three-body cluster state in 11B
秋宗 秀俊
Nucl.Phys. A790, 290c 2007.11
Joint Work
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Dilute 2α + t cluster structure in 11B
秋宗 秀俊
Nucl.Phys. A788, 301c 2007.11
Joint Work
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Isotopic Dependence of the Giant Monopole Resonance in the Even-A 112-124Sn Isotopes and the Asymmetry Term in Nuclear Incompressibility
秋宗 秀俊
Phys.Rev.Lett. 99, 162503 2007.11
Joint Work
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Atomic charge-exchange between semi-relativistic (ν/c = 0.49) helium ions and targets from carbon to lead
秋宗 秀俊
Nucl.Instrum.Methods Phys.Res. B264, 221 2007.11
Joint Work
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Analog of the giant dipole resonance in 4He
秋宗 秀俊
Phys.Rev. C 76, 021305 2007.11
Joint Work
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Backward-angle photoproduction of π0 mesons on the proton at Eγ = 1.5-2.4 GeV
秋宗 秀俊
Phys.Lett. B 657, 32 2007.11
Joint Work
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Damping mechanisms of high-lying single-particle states in 91Nb
秋宗 秀俊
Phys.Rev. C 75, 014311 2007.11
Joint Work
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Extraction of Weak Transition Strengths via the (3He, t) Reaction at 420 MeV
秋宗 秀俊
Phys.Rev.Lett. 99, 202501 2007.11
Joint Work
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Extraction of Weak Transition Strengths via the ($^{3}$He, t) Reaction at 420 MeV Reviewed
R. G. Zegers, T. Adachi, H. Akimune, S. M. Austin, A. M. van den Berg, B. A. Brown, Y. Fujita, M. Fujiwara, S. Gales, C. J. Guess, M. N. Harakeh, H. Hashimoto, K. Hatanaka, R. Hayami, G. W. Hitt, M. E. Howard, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, M. Matsubara, K. Nakanishi, S. Nakayama, S. Okumura, T. Ohta, Y. Sakemi, Y. Shimbara, Y. Shimizu, C. Scholl, C. Simenel, Y. Tameshige, A. Tamii, M. Uchida, T. Yamagata, M. Yosoi
Phys.Rev.Lett. 99 202501 2007.11
Joint Work
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The Giant Monopole Resonance in the Sn Isotopes: Why is Tin so Reviewed
U. Garg, T. Li, S. Okumura, H. Akimune, M. Fujiwara, M. N. Harakeh, H. Hashimoto, M. Itoh, Y. Iwao, T. Kawabata, K. Kawase, Y. Liu, R. Marks, T. Murakami, K. Nakanishi, K. Nayak, P. V. Madhusudhana Rao, H. Sakaguchi, Y. Terashima, M. Uchida, Y. Yasuda, M. Yosoi, J. Zenihiro
Nucl.Phys. A788 36c 2007.11
Joint Work
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Backward-angle photoproduction of $\pi ^{0}$ mesons on the proton at E$\gamma$ = 1.5-2.4 GeV Reviewed
M. Sumihama, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hicks, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, H. Kawai, Z. Y. Kim, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, T. Nakano, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, T. Sato, P. M. Shagin, Y. Shiino, H. Shimizu, Y. Sugaya, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yosoi, R. G. T. Zegers
Phys.Lett. B 657 32 2007.11
Joint Work
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Damping mechanisms of high-lying single-particle states in $^{91}$Nb Reviewed
H. K. T. van der Molen, H. Akimune, A. M. van den Berg, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, M. N. Harakeh, M. Hunyadi, F. Ihara, T. Inomata, K. Ishibashi, J. Janecke, N. Kalantar-Nayestanaki, H. Laurent, I. Lhenry, T. W. O'Donnell, V. A. Rodin, A. Tamii, H. Toyokawa, M. H. Urin, H. Yoshida, M. Yosoi
Phys.Rev. C 75 14311 2007.11
Joint Work
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Analog of the giant dipole resonance in $^{4}$He
S. Nakayama, E. Matsumoto, R. Hayami, K. Fushimi, H. Kawasuso, K. Yasuda, T. Yamagata, H. Akimune, H. Ikemizu, M. Fujiwara, M. Yosoi, K. Nakanishi, K. Kawase, H. Hashimoto, T. Oota, K. Sagara, T. Kudoh, S. Asaji, T. Ishida, M. Tanaka, M. B. Greenfield
Phys.Rev. C 76 ( 2 ) 21305 2007.11
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Damping mechanisms of high-lying single-particle states in 91Nb
HKT Van Der Molen, H Akimune, AM Van den Berg, I Daito, H Fujimura, Y Fujita, M Fujiwara, MN Harakeh, M Hunyadi, F Ihara, T Inomata, K Ishibashi, J J_necke, N Kalantar-Nayestanaki, H Laurent, I Lhenry, TW O'Donnell, VA Rodin, A Tamii, H Toyokawa, MH Urin, H Yoshida, M Yosoi
Phys.Rev. C 75 ( 1 ) 14311 2007.11
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R. Meharchand, H. Akimune, A. M. van, den Berg, Y. Fujita, M. Fujiwara, S. Gales, M. N. Harakeh, H. Hashimoto, R. Hayami, G. W. Hitt, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, K. Nakanishi, S. Nakayama, S. Okumura, Y. Shimbara, M. Uchida, T. Yamagata, M. Yosoi, R. G. T. Zegers
Nucl.Instrum.Methods Phys.Res. 264 ( 2 ) 221 - 226 2007.11
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Backward-angle photoproduction of pi(0) mesons on the proton at E-gamma=1.5-2.4 GeV
M. Sumihama, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Date, H. Ejiri, H. Fujimura, A. Fujiwara, K. Hicks, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, H. Kawai, Z. Y. Kim, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsumura, N. Matsuoka, T. Mibe, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, T. Nakano, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, T. Sato, P. M. Shagin, Y. Shiino, H. Shimizu, Y. Sugaya, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yosoi, R. G. T. Zegers
PHYSICS LETTERS B 657 ( 1-3 ) 32 - 37 2007.11
Joint Work
Publisher：ELSEVIER SCIENCE BV
Differential cross sections and photon beam asymmetries for pi(0) photoproduction have been measured at E-gamma = 1.5-2.4 GeV and at the pi(0) scattering angles, -1 < cos Theta(c.m). < -0.6. The energy-dependence of differential cross sections for u-channel pi(0) production has been determined. An enhancement at backward angles is found above E-gamma = 1.9 GeV. This is likely to be due to u-channel diagrams. Photon beam asymmetries have been obtained for the first time at backward angles, showing a strong angular dependence at E-gamma > 2.0 GeV. (C) 2007 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2007.10.032
Other Link： http://orcid.org/0000-0001-5237-5718
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Extraction of weak transition strengths via the (He-3, t) reaction at 420 MeV
R. G. T. Zegers, T. Adachi, H. Akimune, Sam M. Austin, A. M. van den Berg, B. A. Brown, Y. Fujita, M. Fujiwara, S. Gales, C. J. Guess, M. N. Harakeh, H. Hashimoto, K. Hatanaka, R. Hayami, G. W. Hitt, M. E. Howard, M. Itoh, T. Kawabata, K. Kawase, M. Kinoshita, M. Matsubara, K. Nakanishi, S. Nakayama, S. Okumura, T. Ohta, Y. Sakemi, Y. Shimbara, Y. Shimizu, C. Scholl, C. Simenel, Y. Tameshige, A. Tamii, M. Uchida, T. Yamagata, M. Yosoi
PHYSICAL REVIEW LETTERS 99 ( 20 ) 202501 2007.11
Joint Work
Publisher：AMER PHYSICAL SOC
Differential cross sections for transitions of known weak strength were measured with the (He-3, t) reaction at 420 MeV on targets of C-12, C-13, O-18, Mg-26, Ni-58, Ni-60, Zr-90, Sn-118, Sn-120, and Pb-208. Using these data, it is shown that the proportionalities between strengths and cross sections for this probe follow simple trends as a function of mass number. These trends can be used to confidently determine Gamow-Teller strength distributions in nuclei for which the proportionality cannot be calibrated via beta-decay strengths. Although theoretical calculations in the distorted-wave Born approximation overestimate the data, they allow one to understand the main experimental features and to predict deviations from the simple trends observed in some of the transitions.
DOI： 10.1103/PhysRevLett.99.202501
Other Link： http://orcid.org/0000-0001-5237-5718
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T. Li, U. Garg, Y. Liu, R. Marks, B. K. Nayak, P. V.Madhusudhana Rao, M. Fujiwara, H. Hashimoto, K. Kawase, K. Nakanishi, S. Okumura, M. Yosoi, M. Itoh, M. Ichikawa, R. Matsuo, T. Terazono, M. Uchida, T. Kawabata, H. Akimune, Y. Iwao, T. Murakami, H. Sakaguchi, S. Terashima, Y. Yasuda, J. Zenihiro, M. N. Harakeh
Physical Review Letters 99 ( 16 ) 162503 2007.10
Joint Work
The strength distributions of the giant monopole resonance (GMR) have been measured in the even-A Sn isotopes (A=112-124) with inelastic scattering of 400-MeV α particles in the angular range 0°-8.5°. We find that the experimentally observed GMR energies of the Sn isotopes are lower than the values predicted by theoretical calculations that reproduce the GMR energies in Pb208 and Zr90 very well. From the GMR data, a value of Kτ=- 550±100MeV is obtained for the asymmetry term in the nuclear incompressibility. © 2007 The American Physical Society.
DOI： 10.1103/PhysRevLett.99.162503
Other Link： http://orcid.org/0000-0001-5237-5718
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Three-body cluster state in B-11
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-En'yo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
NUCLEAR PHYSICS A 790 ( 1-4 ) 290C - 293C 2007.6
Joint Work
Publisher：ELSEVIER SCIENCE BV
The cluster structures of the excited states in B-11 are studied by analyzing the isoscalar monopole and quadrupole strengths in the B-11(d,d') reaction at E-d = 200 MeV. The excitation strengths are compared with the predictions by the shell-model and antisymmetrized molecular-dynamics (AMD) calculations. It is found that the large monopole strength for the 3/2(3)(-) state at E-x = 8.56 MeV is well described by the AMD calculation and is an evidence for a developed three-body 2 alpha + t cluster structure.
DOI： 10.1016/j.nuclphysa.2007.03.047
Other Link： http://orcid.org/0000-0001-5237-5718
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The Giant Monopole Resonance in the Sn Isotopes: Why is Tin so "Fluffy"?
U. Garg, T. Li, S. Okumura, H. Akimune, M. Fujiwara, M. N. Harakeh, H. Hashimoto, M. Itoh, Y. Iwao, T. Kawabata, K. Kawase, Y. Liu, R. Marks, T. Murakami, K. Nakanishi, B. K. Nayak, P. V. Madhusudhana Rao, H. Sakaguchi, Y. Terashima, M. Uchida, Y. Yasuda, M. Yosoi, J. Zenihiro
Nuclear Physics A 788 ( 1-4 ) 36 - 43 2007.5
Joint Work
The isoscalar giant monopole resonance (GMR) has been investigated in a series of Sn isotopes (A=112-124) using inelastic scattering of 400-MeV α particles at extremely forward angles (including 0°). The primary aim of the investigation has been to explore the role of the "symmetry-energy" term in the expression for nuclear incompressibility. It is found that the excitation energies of the GMR in the Sn isotopes are significantly lower than those expected from the nuclear incompressibility previously extracted from the available data on the compressional-mode giant resonances. © 2007 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.nuclphysa.2007.01.046
Other Link： http://orcid.org/0000-0001-5237-5718
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Dilute 2 alpha+t cluster structure in B-11
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-En'yo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
NUCLEAR PHYSICS A 788 ( 1-4 ) 301C - 306C 2007.5
Joint Work
Publisher：ELSEVIER SCIENCE BV
The cluster structures of the excited states in B-11 are studied by analyzing the isoscalar monopole and quadrupole strengths in the B-11(d,d') reaction at Ed = 200 MeV. The excitation strengths are compared with the predictions by the shell-model and antisymmetrized molecular-dynamics (AMD) calculations. It is found that the large monopole strength for the 3/2(3)(-) state at E-x = 8.56 MeV is well described by the AMD calculation and is an evidence for a developed 2 alpha + t cluster structure.
DOI： 10.1016/j.nuclphysa.2007.01.016
Other Link： http://orcid.org/0000-0001-5237-5718
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2 alpha + t cluster structure in B-11
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-En'yo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
PHYSICS LETTERS B 646 ( 1 ) 6 - 11 2007.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
The cluster structures of the excited states in B-11 are studied by analyzing the isoscalar monopole and quadrupole strengths in the (11)(d,d') reaction at E-d = 200 MeV. The excitation strengths are compared with the predictions by the shell-model and antisymmetrized molecular-dynamics (AMD) calculations. The large monopole strength for the 3/2(3)(-) state at E-x = 8.56 MeV is well described by the AMD calculation and is suggested to be an evidence for a well developed 2 alpha + t cluster structure. (c) 2007 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2006.11.079
Other Link： http://orcid.org/0000-0001-5237-5718
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Matsumoto E, Nakayama S, Hayami R, Fushimi K, Kawasuso H, Yasuda K, Yamagata T, Akimune H, Ikemizu H, Fujiwara M, Yosoi M, Nakanishi K, Kawase K, Hashimoto H, Oota T, Sagara K, Kudoh T, Asaji S, Ishida T, Tanaka M, Greenfield M.B.
AIP Conference Proceedings 891 427 - 430 2007
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Excitation and charged particle decay of dipole resonance analogs in the α Clusters of6Li and7Li
Yamagata T, Akimune H, Nakayama S, Fujiwara M, Fushimi K, Greenfield M.B, Hara K, Hara K.Y, Hashimoto K, Ichihara K, Ikemizu H, Kawase K, Kinoshita M, Matsui Y, Nakanishi K, Ohta M, Sakama M, Tanaka M, Utsunomiya H, Warashina N, Yosoi M.
AIP Conference Proceedings 891 214 - 221 2007
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Measurement of the γ→p→K+Λ reaction at backward angles
Hicks K, Mibe T, Sumihama M, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fukui S, Fujimura H, Fujiwara M, Hasegawa S, Hosaka A, Hotta T, Imai K, Ishikawa T, Iwata T, Juli{\'a}-D{\'i}az B, Kato Y, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Lee T.-S.H, Makino S, Matsuda T, Matsumura T, Matsuoka N, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Ozaki S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu A, Shimizu H, Sugaya Y, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review C - Nuclear Physics 76 ( 4 ) 2007
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Measurement of the Gamow-Teller strength distribution in 58Co via the 58Ni(t, 3He) reaction at 115 MeV/nucleon
秋宗 秀俊
Phys.Rev. C 74, 034333 2006.11
Single Work
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Partial Photoneutron Cross Sections for the Isomeric State 180Tam
秋宗 秀俊
Phys.Rev.Lett. 96, 192501 2006.11
Single Work
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Bi-modal isoscalar giant dipole strength in 58Ni
秋宗 秀俊
Phys.Lett. B 637, 43 2006.11
Single Work
-
Photoneutron cross section measurements on the N = 82 nuclei 139La and 141Pr: Implications for p-process nucleosynthesis
秋宗 秀俊
Phys.Rev. C 74, 025806 2006.11
Single Work
-
Excitation of dipole resonances in 4He and in the α clusters of 6Li and 7Li
秋宗 秀俊
Phys.Rev. C 74, 014309 2006.11
Single Work
-
The (t, 3He) and (3He, t) reactions as probes of Gamow-Teller strength
秋宗 秀俊
Phys.Rev. C 74, 024309 (2006) 2006.11
Single Work
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The (t, $^{3}$He) and ($^{3}$He, t) reactions as probes of Gamow-Teller strength Reviewed
R. G. T. Zegers, H. Akimune, S. M. Austin, D. Bazin, A. M. van den Berg, G. P. A. Berg, B. A. Brown, J. Brown, A. L. Cole, I. Daito, Y. Fujita, M. Fujiwara, S. Gales, M. N. Harakeh, H. Hashimoto, R. Hayami, G. W. Hitt, M. E. Howard, M. Itoh, J. Janecke, T. Kawabata, K. Kawase, M. Kinoshita, T. Nakamura, K. Nakanishi, S. Nakayama, S. Okumura, W. A. Richter, D. A. Roberts, B. M. Sherrill, Y. Shimbara, M. Steiner, M. Uchida, H. Ueno, T. Yamagata, M. Yosoi
Phys.Rev. C 74 24309 2006.11
Joint Work
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Measurement of the Gamow-Teller strength distribution in $^{58}$Co via the $^{58}$Ni(t, $^{3}$He) reaction at 115 MeV / nucleon Reviewed
A. L. Cole, H. Akimune, S. M. Austin, D. Bazin, A. M. van den Berg, G. P. A. Berg, J. Brown, I. Daito, Y. Fujita, M. Fujiwara, S. Gupta, K. Hara, M. N. Harakeh, J. Janecke, T. Kawabata, T. Nakamura, D. A. Roberts, B. M. Sherrill, M. Steiner, H. Ueno, R. G. T. Zegers
Phys.Rev. C 74 34333 2006.11
Joint Work
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Partial Photoneutron Cross Sections for the Isomeric State $^{180}$Ta$^{m}$ Reviewed
S. Goko, H. Utsunomiya, S. Goriely, A. Makinaga, T. Kaihori, S. Hohara, H. Akimune, T. Yamagata, Y. -W. Lui, H. Toyokawa, A. J. Koning, S. Hilaire
Phys.Rev.Lett. 96 192501 2006.11
Joint Work
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Photoneutron cross section measurements on the N = 82 nuclei $^{139}$La and $^{141}$Pr: Implications for p-process nucleosynthesis Reviewed
H. Utsunomiya, A. Makinaga, S. Goko, T. Kaihori, H. Akimune, T. Yamagata, M. Ohta, H. Toyokawa, S. Muller, Y. -W. Lui, S. Goriely
Phys.Rev. C 74 25806 2006.11
Joint Work
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Excitation of dipole resonances in $^{4}$He and in the $\alpha$ clusters of $^{6}$Li and $^{7}$Li Reviewed
T. Yamagata, N. Warashina, H. Akimune, S. Asaji, M. Fujiwara, M. B. Greenfield, H. Hashimoto, R. Hayami, T. Ishida, K. Kawase, M. Kinoshita, T. Kudoh, K. Nakanishi, S. Nakayama, S. Okumura, K. Sagara, M. Tanaka, H. Utsunomiya, M. Yosoi
Phys.Rev. C 74 14309 2006.11
Joint Work
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The (t, 3He) and (3He, t) reactions as probes of Gamow-Teller strength
RGT Zegers, H Akimune, Sam M Austin, D Bazin, AM Van den Berg, GPA Berg, BA Brown, J Brown, AL Cole, I Daito, Y Fujita, M Fujiwara, S Gales, MN Harakeh, H Hashimoto, R Hayami, GW Hitt, ME Howard, M Itoh, J J_necke, T Kawabata, K Kawase, M Kinoshita, T Nakamura, K Nakanishi, S Nakayama, S Okumura, WA Richter, DA Roberts, BM Sherrill, Y Shimbara, M Steiner, M Uchida, H Ueno, T Yamagata, M Yosoi
Phys.Rev. C 74 ( 2 ) 24309 2006.11
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Measurement of the Gamow-Teller strength distribution in C, via the N, He, reaction a, MeV/nucleon
Phys.Rev. C 74 ( 3 ) 34333 2006.11
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Excitation of dipole resonances in $^{4}$He and in the $\alpha$ clusters of $^{6}$Li and $^{7}$Li
T. Yamagata, N. Warashina, H. Akimune, S. Asaji, M. Fujiwara, M. B. Greenfield, H. Hashimoto, R. Hayami, T. Ishida, K. Kawase, M. Kinoshita, T. Kudoh, K. Nakanishi, S. Nakayama, S. Okumura, K. Sagara, M. Tanaka, H. Utsunomiya, M. Yosoi
Phys.Rev. C 74 ( 1 ) 14309 2006.11
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H. Utsunomiya, A. Makinaga, S. Goko, T. Kaihori, H. Akimune, T. Yamagata, M. Ohta, H. Toyokawa, S. Mueller, Y. -W. Lui, S. Goriely
PHYSICAL REVIEW C 74 ( 2 ) 25806 2006.8
Joint Work
Publisher：AMER PHYSICAL SOC
Cross sections of the La-139(gamma,n) and Pr-141(gamma,n) reactions were measured using quasi-monochromatic gamma-ray beams from laser Compton scattering. The results are compared to the predictions of Hauser-Feshbach statistical calculations using different models for the gamma-ray strength function. The model parameters are constrained by the present experimental data and used to estimate the stellar photoneutron rates and their associated uncertainties and to study the implication for the production of the rare odd-odd nuclide La-138 by the p process. No evidence for a large thermonuclear p-process contribution to the solar La-138 is found. The need to further explore the photodestruction rate of La-138 is emphasized.
DOI： 10.1103/PhysRevC.74.025806
Other Link： http://orcid.org/0000-0001-5237-5718
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"Bi-modal" isoscalar giant dipole strength in Ni-58
B. K. Nayak, U. Garg, M. Hedden, M. Koss, T. Li, Y. Liu, P. V. Madhusudhana Rao, S. Zhu, M. Itoh, H. Sakaguchi, H. Takeda, M. Uchida, Y. Yasuda, M. Yosoi, H. Fujimura, M. Fujiwara, K. Hara, T. Kawabata, H. Akimune, M. N. Harakeh
PHYSICS LETTERS B 637 ( 1-2 ) 43 - 47 2006.6
Joint Work
Publisher：ELSEVIER SCIENCE BV
The strength distribution of the isoscalar giant dipole resonance (ISGDR) in Ni-58 has been obtained over the energy range 10.5-49.5 MeV via extreme forward angle scattering (including 0 degrees) of 386 MeV alpha particles. We observe a "bi-modal" El strength distribution for the first time in an A < 90 nucleus. The observed ISGDR strength distribution is in reasonable agreement with the predictions of a recent RPA calculation. (c) 2006 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2006.03.034
Other Link： http://orcid.org/0000-0001-5237-5718
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Partial photoneutron cross sections for the isomeric state Ta-180(m)
S. Goko, H. Utsunomiya, S. Goriely, A. Makinaga, T. Kaihori, S. Hohara, H. Akimune, T. Yamagata, Y. -W. Lui, H. Toyokawa, A. J. Koning, S. Hilaire
PHYSICAL REVIEW LETTERS 96 ( 19 ) 192501 2006.5
Joint Work
Publisher：AMER PHYSICAL SOC
Photoneutron cross sections for Ta-181(gamma,n)Ta-180(m) were determined from simultaneous measurements of total cross sections (sigma(tot)) and ground-state cross sections (sigma(gs)) for Ta-180 in photodisintegration of Ta-181 with laser Compton-backscattered gamma rays. Techniques of direct neutron counting and photoactivation were used for the measurement of sigma(tot) and sigma(gs), respectively. The partial cross sections for the isomeric state serves as a novel probe of the nuclear level density of Ta-180. Implications for the p- and s-process nucleosynthesis of Ta-180(m) are given.
DOI： 10.1103/PhysRevLett.96.192501
Other Link： http://orcid.org/0000-0001-5237-5718
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M Sumihama, JK Ahn, H Akimune, Y Asano, C Bennhold, WC Chang, T Corthals, S Date, H Ejiri, H Fujimura, M Fujiwara, M Guidal, K Hicks, T Hotta, K Imai, T Ishikawa, T Iwata, H Kawai, ZY Kim, K Kino, H Kohri, N Kumagai, S Makino, T Mart, T Matsumura, N Matsuoka, T Mibe, M Miyabe, Y Miyachi, M Morita, N Muramatsu, T Nakano, M Niiyama, M Nomachi, Y Ohashi, T Ooba, H Ohkuma, DS Oshuev, C Rangacharyulu, A Sakaguchi, T Sasaki, PM Shagin, Y Shiino, H Shimizu, Y Sugaya, H Toyokawa, A Wakai, CW Wang, SC Wang, K Yonehara, T Yorita, M Yosoi, RGT Zegers
PHYSICAL REVIEW C 73 ( 3 ) 2006.3
Joint Work
Publisher：AMER PHYSICAL SOC
Differential cross sections and photon-beam asymmetries for the gamma p -> K(+)Lambda and gamma p -> K(+)Sigma(0) reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and in the angular range from Theta(c.m.)=0(degrees) to 60(degrees) of the K+ scattering angle in the center-of-mass system at the SPring-8/LEPS facility. The photon-beam asymmetries for both the reactions have been found to be positive and to increase with the photon energy. The measured differential cross sections agree with the data measured by the CLAS Collaboration at cos Theta(c.m.)< 0.9 within the experimental uncertainties, but the discrepancy with the SAPHIR data for the K(+)Lambda reaction is large at cos Theta(c.m.)> 0.9. In the K(+)Lambda reaction, the resonance-like structure found in the CLAS and SAPHIR data at W=1.96 GeV is confirmed. The differential cross sections at forward angles suggest a strong K-exchange contribution in the t-channel for the K(+)Lambda reaction, but not for the K(+)Sigma(0) reaction.
DOI： 10.1103/PhysRevC.73.035214
Other Link： http://orcid.org/0000-0001-5237-5718
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Kawabata T, Akimune H, Fujita H, Fujiwara M, Hara K, Hatanaka K, Nakanishi K, Shimbara Y, Tamii A, Yoshida H.P, Yosoi M, Fujita Y, Itoh M, Kanada-En{'}yo Y, Kishi S, Sakaguchi H, Terashima S, Yasuda Y, Uchida M, Wakasa T.
Modern Physics Letters A 21 ( 31-33 ) 2383 - 2392 2006
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Differential cross section and photon-beam asymmetry for the γ→n→K+Σ- Reaction at Eγ=1.5-2.4GeV
Kohri H, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Date{'} S, Ejiri H, Fukui S, Fujimura H, Fujiwara M, Hasegawa S, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kumagai N, Makino S, Mart T, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu A, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review Letters 97 ( 8 ) 2006
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Photodisintegration of80Se as a probe of neutron capture for the s-process branch-point nucleus79Se
Makinaga A, Utsunomiya H, Goko S, Kaihori T, Akimune H, Yamagata T, Hohara S, Goriely S, Toyokawa H, Harano H, Matsumoto T, Harada H, Kitatani F, Hara K.Y, Lui Y
Proceedings of Science 2006
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Photodisintegration of 181Ta leading to the isomeric state 180Tam
Goko S, Utsunomiya H, Makinaga A, Kaihori T, Akimune H, Yamagata T, Hohara S, Goriely S, Koning A.J, Hilaire S, Toyokawa H, Lui Y
Proceedings of Science 2006
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H Harada, K Furutaka, S Nakamura, K Osaka, H Akimune, H Utsunomiya, T Ohsaki, M Igashira
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 554 ( 1-3 ) 306 - 313 2005.12
Joint Work
Publisher：ELSEVIER SCIENCE BV
The response function of a high-resolution high-energy photon spectrometer (HHS), consisting of a twin Ge detector and BGO (Bi3Ge4O12) anti-coincidence shields, has been measured for 10.763 MeV monochromatic gamma-rays generated in a resonant reaction Al-27(p,gamma)Si-28. The experimental response functions measured with and without the anti-coincidence were compared with results by Monte Carlo simulations, in which a pulse-height degradation effect associated with a surface channel of the twin Ge detector hits been included. Excellent agreement wits obtained between the experimental response functions and the simulations. (c) 2005 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.nima.2005.07.065
Other Link： http://orcid.org/0000-0001-5237-5718
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φ photo-production from Li, C, Al, and Cu nuclei at Eγ = 1.5-2.4 GeV
秋宗 秀俊
Phys.Lett. B 608, 215 2005.11
Joint Work
-
Detection of nuclear de-excitation gamma-rays in water Cherenkov detector
秋宗 秀俊
Nucl.Phys. B(Proc.Supp.) S139, 72 2005.11
Joint Work
-
Weak interaction strengths for supernovae calculations via the (t, 3He) reaction on medium-heavy nuclei
秋宗 秀俊
Nucl.Phys. A758, 67c 2005.11
Joint Work
-
φ photo-production from Li, C, Al, and Cu nuclei at Eγ = 1.5-2.4 GeV
秋宗 秀俊
Phys.Lett. B 608, 215 2005.11
Joint Work
-
M1 cross section for the photodisintegration of deuterium using the 2H(7Li, 7Be) reaction
秋宗 秀俊
Phys.Rev. C 72, 041001 2005.11
Joint Work
-
Photodisintegration cross section measurements on 186W, 187Re, and 188Os: Implications for the Re-Os cosmochronology
秋宗 秀俊
Phys.Rev. C 72, 025808 2005.11
Joint Work
-
Di-trinucleon cluster resonances in A = 6 isobar nuclei
秋宗 秀俊
Phys.Rev. C 71, 064316 2005.11
Joint Work
-
Photodisintegration cross section measurements on 186W, 187Re, and 188Os: Implications for the Re-Os cosmochronology
秋宗 秀俊
Phys.Rev. C 72, 025808 2005.11
Joint Work
-
Weak interaction strengths for supernovae calculations via the (t, $^{3}$He) reaction on medium-heavy nuclei Reviewed
R. G. T. Zegers, A. L. Cole, H. Akimune, S. M. Austin, D. Bazin, A. M. van den Berg, G. P. A. Berg, J. Brown, I. Daito, Y. Fujita, M. Fujiwara, K. Hara, M. N. Harakeh, G. W. Hitt, M. E. Howard, J. Janecke, T. Kawabataj T. Nakamura, H. Ueno, H. Schatz, B. M. Sherrill, M. Steiner
Nucl.Phys. A758 67c 2005.11
Joint Work
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$\phi$ photo-production from Li, C, Al, and Cu nuclei at E$_{\gamma}$ = 1.5-2.4 GeV Reviewed
T. Ishikawa, D. S. Ahn, J. K. Ahn, H. Akimune, W. C. Chang, S. Date, H. Fujimura, M. Fujiwara, K. Hicks, T. Hotta, K. Imai, H. Kawai, K. Kino, H. Kohri, T. Matsumura, T. Mibe, K. Miwa, M. Miyabe, M. Morita, T. Murakami, N. Muramatsu, H. Nakamura, M. Nakamura, T. Nakano, M. Niiyama, M. Nomachi, Y. Ohashi, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, Y. Shiino, Y. Sakemi, H. Shimizu, Y. Sugaya, M. Sumihama, Y. Toi, H. Toyokawa, C. W. Wang, T. Yorita, M. Yosoi, R. G. T. Zegers
Phys.Lett. B 608 215 2005.11
Joint Work
-
Detection of nuclear de-excitation gamma-rays in water Cherenkov detector Reviewed
K. Kobayashi, Y. Itow, M. Shiozawa, M. Yosoi, H. Toyokawa, H. Akimune, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hara, K. Y. Hara, T. Ishikawa, M. Itoh, T. Kawabata, M. Nakamura, H. Sakaguchi, Y. Sakemi, H. Takeda, M. Uchida, T. Yamada, Y. Yasuda, H. P. Yoshida, R. G. T. Zegers
Nucl.Phys. B(Proc.Supp.) S139 72 2005.11
Joint Work
-
M1 cross section for the photodisintegration of deuterium using the $^{2}$H($^{7}$Li, $^{7}$Be) reaction Reviewed
S. Nakayama, T. Yamagata, H. Akimune, Y. Arimoto, H. Daito, H. Ejiri, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, M. B. Greenfield, H. Kohri, N. Koori, K. Takahisa, T. Takeuchi, M. Tanaka, K. Yonehara, H. P. Yoshida
Phys.Rev. C 72 41001 2005.11
Joint Work
-
Photodisintegration cross section measurements on $^{186}$W, $^{187}$Re, and $^{188}$Os: Implications for the Re-Os cosmochronology Reviewed
T. Shizuma, H. Utsunomiya, P. Mohr, T. Hayakawa, S. Goko, A. Makinaga, H. Akimune, T. Yamagata, M. Ohta, H. Ohgaki, Y. -W. Lui, H. Toyokawa, A. Uritani, S. Goriely
Phys.Rev. C 72 25808 2005.11
Joint Work
-
Di-trinucleon cluster resonances in A = 6 isobar nuclei Reviewed
T. Yamagata, H. Akimune, S. Nakayama, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, K. Ichihara, K. Kawase, M. Kinoshita, Y. Matsui, K. Nakanishi, M. Ohta, A. Shiokawa, M. Tanaka, H. Utsunomiya, M. Yosoi
Phys.Rev. C 71 64316 2005.11
Joint Work
-
Weak interaction strengths for supernovae calculations via the (t, He) reaction on medium-heavy nuclei
Nucl.Phys. A 758 ( 1-4 SPEC. ISS. ) 67c - 70 2005.11
-
S. Nakayama, T. Yamagata, H. Akimune, Y. Arimoto, H. Daito, H. Ejiri, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, M. B. Greenfield, H. Kohri, N. Koori, K. Takahisa, T. Takeuchi, M. Tanaka, K. Yonehara, H. P. Yoshida
Phys.Rev. C 72 ( 4 ) 41001 2005.11
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Surface channel effect on gamma-ray response functions of coaxial germanium detectors
H Utsunomiya, H Akimune, K Osaka, T Kaihori, K Furutaka, H Harada
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 548 ( 3 ) 455 - 463 2005.8
Joint Work
Publisher：ELSEVIER SCIENCE BV
A surface channel formed in a coaxial germanium detector degrades the pulse-height of output signals. The pulse-height degradation gives rise to an enhancement of low pulse-height events in gamma-ray response functions at the cost of the full-energy peak. This phenomenon was closely examined for a twin coaxial-germanium detector. It was found that imperfect charge collection is primarily caused by p-type surface channels and supplemented by the n(+)-i and i-p(+) boundaries, producing low-energy events both in the valley between the full-energy peak and the Compton edge and on the hill below the Compton edge. It is shown that experimental response functions of the twin Ge can be reproduced with high precision by incorporating the imperfect charge collection in Monte Carlo simulations in a phenomenological way. (c) 2005 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.nima.2005.04.062
Other Link： http://orcid.org/0000-0001-5237-5718
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T Shizuma, H Utsunomiya, P Mohr, T Hayakawa, S Goko, A Makinaga, H Akimune, T Yamagata, M Ohta, H Ohgaki, YW Lui, H Toyokawa, A Uritani, S Goriely
PHYSICAL REVIEW C 72 ( 2 ) 25808 2005.8
Joint Work
Publisher：AMER PHYSICAL SOC
Cross sections of the W-186, Re-187, Os-188(gamma,n) reactions were measured using quasimonochromatic photon beams from laser Compton scattering with average energies from 7.3 to 10.9 MeV. The results are compared with the predictions of Hauser-Feshbach statistical calculations using four different sets of input parameters. In addition, the inverse neutron capture cross sections were evaluated by constraining the model parameters, especially the E1 strength function, on the basis of the experimental data. The present experiment helps to further constrain the correction factor F-sigma for the neutron capture on the 9.75 keV state in Os-187. Implications of F-sigma for the Re-Os cosmochronology are discussed with a focus on the uncertainty in the estimate of the age of the galaxy.
DOI： 10.1103/PhysRevC.72.025808
Other Link： http://orcid.org/0000-0001-5237-5718
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Di-trinucleon cluster resonances in A=6 isobar nuclei
T Yamagata, H Akimune, S Nakayama, M Fujiwara, K Fushimi, MB Greenfield, K Hara, KY Hara, H Hashimoto, K Ichihara, K Kawase, M Kinoshita, Y Matsui, K Nakanishi, M Ohta, A Shiokawa, M Tanaka, H Utsunomiya, M Yosoi
PHYSICAL REVIEW C 71 ( 6 ) 64316 2005.6
Joint Work
Publisher：AMER PHYSICAL SOC
The di-trinucleon clustering resonances of He-3+He-3 in Be-6 and t+t in He-6 were studied via the Li-6(He-3, t He-3) and Li-6(Li-7, Be-7 t) reactions at incident energies of 450 and 455 MeV, respectively. A new resonance in Be-6 was found at E-x=18.0 +/- 1.2 MeV with a width of 9.2 +/- 1.0 MeV in the binary decay channel of Be-6 -> He-3+He-3. The resonance in He-6 previously reported was also observed at E-x=18.0 +/- 1.0 MeV with a width of 9.5 +/- 1.0 MeV in the binary decay channel of He-6 -> t+t. The branching ratios of the resonances for each binary decay were both 0.7 +/- 1.0, which was larger than the branching ratio calculated in a statistical model by two orders of magnitude. The angular correlations measured for t and He-3 particles in the binary decay show a contribution dominantly from the multipolarity of L=1. We suggest that the resonances are the members of the isobaric triplet of the P-3 resonances in A=6 nuclei.
DOI： 10.1103/PhysRevC.71.064316
Other Link： http://orcid.org/0000-0001-5237-5718
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phi photo-production from Li, C, Al, and Cu nuclei at E-gamma=1.5-2.4 GeV
T Ishikawa, DS Ahn, JK Ahn, H Akimune, WC Chang, S Date, H Fujimura, M Fujiwara, K Hicks, T Hotta, K Imai, H Kawai, K Kino, H Kohri, T Matsumura, T Mibe, K Miwa, M Miyabe, M Morita, T Murakami, N Muramatsu, H Nakamura, M Nakamura, T Nakano, M Niiyama, M Nomachi, Y Ohashi, T Ooba, DS Oshuev, C Rangacharyulu, A Sakaguchi, Y Shiino, Y Sakemi, H Shimizu, Y Sugaya, M Sumihama, Y Toi, H Toyokawa, CW Wang, T Yorita, M Yosoi, RGT Zegers
PHYSICS LETTERS B 608 ( 3-4 ) 215 - 222 2005.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
The photo-production of phi mesons from Li, C, Al, and Cu at forward angles has been measured at Egamma = 1.5-2.4 GeV. The number of events for incoherent phi photo-production is found to have a target mass number dependence of A(0.72+/-0.07) in the kinematical region of vertical bart\ less than or equal to 0.6 GeV2/c(2). The total cross section of the phi-nucleon interaction, sigmaphi(N), has been estimated as 35(-)(11)(+)(17) mb using the A-dependence of the phi photo-production yield and a Glauber-type multiple scattering theory. This value is much larger than sigmaphi(N) in free space, suggesting that the phi properties might change in the nuclear medium. (C) 2005 Elsevier B.V. All rights reserved.
DOI： 10.1016/j.physletb.2005.01.023
Other Link： http://orcid.org/0000-0001-5237-5718
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Detection of nuclear de-excitation gamma-rays in water Cherenkov detector
K Kobayashi, Y Itow, M Shiozawa, M Yosoi, H Toyokawa, H Akimune, H Ejiri, H Fujimura, M Fujiwara, K Hara, KY Hara, T Ishikawa, M Itoh, T Kawabata, M Nakamura, H Sakaguchi, Y Sakemi, H Takeda, M Uchida, T Yamada, Y Yasuda, HP Yoshida, RGT Zegers
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS 139 ( 1-3 SPEC. ISS. ) 72 - 76 2005.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
We measured de-excitation gamma-rays from N-15* s-hole state via the O-16(p, 2p)N-15 reaction. The emission probabilities for more than 6 MeV and 3-6 MeV gamma-rays axe estimated to be 3% and 5%, respectively. This result is useful for tagging nucleon decay via p --> (ν) over barK(+) in Super-Kamiokande and neutrino neutral current interaction study.
DOI： 10.1016/j.nuclphysbps.2004.11.206
Other Link： http://orcid.org/0000-0001-5237-5718
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Excitations of the giant dipole resonances in 4He and in the α cluster of 6,7Li via (p,p′) reactions
Yamagata T, Warashina N, Kinoshita M, Akimune H, Asaji S, Fujiwara M, Greenfield M.B, Hashimoto K, Hayami R, Ishida K, Kawase K, Kudoh T, Nakanishi K, Nakayama S, Okumura S, Sagara K, Tanaka M, Utsunomiya H, Yosoi M.
AIP Conference Proceedings 802 301 - 304 2005
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Near-threshold diffractive I-Meson photoproduction from the proton
Mibe T, Chang W.C, Nakano T, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Titov A.I, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review Letters 95 ( 18 ) 2005
-
Experimental results of K+ photoproduction at SPring-8/LEPS
Sumiham M, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Date S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Makino S, Matsumura T, Matsuoka N, Mibe T, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ookuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Sugaya Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yosoi M, Zegers R.G.T.
Nuclear Physics A 754 ( 1-4 SPEC. ISS. ) 2005
-
New approach to M1 cross section for the D(γ,n) via the D( 7Li,7Be) reaction
Nakayama S, Yamagata T, Akimune H, Arimoto Y, Daito H, Ejiri H, Fujimura H, Fujita Y, Fujiwara M, Fushimi K, Greenfield M.B, Kohri H, Koori N, Takahisa K, Takeuchi T, Tanaka M, Yonehara K, Yoshida H.P
AIP Conference Proceedings 802 194 - 197 2005
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Tri-nucleon cluster structure in A=6 nuclei above cluster decay threshold
秋宗 秀俊
Nucl.Phys. A738, 52 2004.11
Single Work
-
Excitation and decay of the isovector spin-flip giant monopole resonance via the 208Pb(3He, tp) reaction at 410 MeV
秋宗 秀俊
Nucl.Phys. A731, 121 2004.11
Single Work
-
Cluster fragmentations of deep (1s)-hole states in light nuclei
秋宗 秀俊
Nucl.Phys. A738, 451 2004.11
Single Work
-
Giant dipole resonances and the analogs of alpha-clusters in A=6 and 7 nuclei
秋宗 秀俊
Nucl.Phys. A738, 467 2004.11
Single Work
-
Excitations of the alpha cluster in A = 6 and 7 nuclei
秋宗 秀俊
Phys.Rev. C 69, 044313 2004.11
Single Work
-
Systematics of the bimodal isoscalar giant dipole resonance
秋宗 秀俊
Phys.Rev. C 69, 051301 2004.11
Single Work
-
Trinucleon cluster structures in 6Li
秋宗 秀俊
Phys.Rev. C 69, 041304 2004.11
Single Work
-
Tri-nucleon cluster-states in 6Li
秋宗 秀俊
Nucl.Phys. A734, 461 2004.11
Single Work
-
t + 3He molecular structures in 6Li studied by (3He, alpha) reaction at 450 MeV
秋宗 秀俊
Nucl.Phys. A731, 355 2004.11
Single Work
-
Neutron-skin thickness in neutron rich isotopes
秋宗 秀俊
Nucl.Phys. A731, 224 2004.11
Single Work
-
Isovector and isoscalar spin-flip M1 strengths in 11B
秋宗 秀俊
Phys.Rev. C 70, 034318 2004.11
Single Work
-
Study of the cluster state at Ex=10.3 MeV in 12C
秋宗 秀俊
Nucl.Phys. A738, 268 2004.11
Single Work
-
The effect of deformation in the isoscalar giant dipole resonance
秋宗 秀俊
Nucl.Phys. A731, 41 2004.11
Single Work
-
Nuclear structure of the spin-isospin excited states in 13N studied via the (3He, t) and (3He, tp) reactions at 450 MeV
秋宗 秀俊
Phys.Rev. C 69, 064327 2004.11
Single Work
-
Excitation and decay of the isovector spin-flip giant monopole resonance via the $^{208}$Pb($^{3}$He, tp) reaction at 410 MeV Reviewed
R. G. T. Zegers, H. Abend, H. Akimune, A. M. van den Berg, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, S. Gales, K. Hara, M. N. Harakeh, T. Ishikawa, T. Kawabata, K. Kawase, T. Mibe, K. Nakanishi, S. Nakayama, H. Toyokawa, M. Uchida, T. Yamagata, K. Yamasaki, M. Yosoi
Nucl.Phys. A731 121 2004.11
Joint Work
-
Systematics of the bimodal isoscalar giant dipole resonance Reviewed
M. Uchida, H. Sakaguchi, M. Itoh, M. Yosoi, T. Kawabata, Y. Yasuda, H. Takeda, T. Murakami, S. Terashima, S. Kishi, U. Garg, P. Boutachkov, M. Hedden, B. Kharraja, M. Koss, B. K. Nayak, S. Zhu, M. Fujiwara, H. Fujimura, H. P. Yoshida, K. Hara, H. Akimune, M. N. Harakeh
Phys.Rev. C 69 51301 2004.11
Joint Work
-
Photonuclear reaction studies at synchrotron radiation facilities in Japan Reviewed
H. Utsunomiya, K. Y. Hara, S. Goko, H. Akimune, T. Yamagata, M. Ohta, H. Ohgaki, H. Toyokawa, T. Hayakawa, T. Shizuma, P. Mohr, Y. -W. Lui, H. Ohkuma, H. Yonehara, K. Soutome, M. Arnould
Nucl.Phys. A738 136 2004.11
Joint Work
-
Excitations of the $\alpha$ cluster in A = 6 and 7 nuclei Reviewed
T. Yamagata, S. Nakayama, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, K. Ichihara, K. Kawase, M. Kinoshita, Y. Matsui, K. Nakanishi, M. Tanaka, H. Utsunomiya, M. Yosoi
Phys.Rev. C 69 44313 2004.11
Joint Work
-
Giant dipole resonances and the analogs of $\alpha$-clusters in A=6 and 7 nuclei Reviewed
T. Yamagata, S. Nakayama, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, K. Hashimoto, K. Ichihara, K. Kawase, M. Kinoshita, Y. Matsui, K. Nakanishi, M. Tanaka, H. Utsunomiya, M. Yosoi
Nucl.Phys. A738 467 2004.11
Joint Work
-
Cluster fragmentations of deep (1s)-hole states in light nuclei Reviewed
M. Yosoi, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, M. Fujiwara, K. Fushimi, K. Hara, K. Y. Hara, H. Hashimoto, T. Ishikawa, M. Itoh, Y. Itow, S. Kishi, T. Kawabata, K. Kawase, M. Kinoshita, K. Kobayashi, M. Nakamura, K. Nakanishi, Y. Nakatsugawa, S. Nakayama, T. Noro, E. Obayashi, S. Okumura, H. Sakaguchi, Y. Sakemi, M. Shiozawa, H. Takeda, T. Taki, A. Tamii, M. Tanaka, S. Terashima, H. Toyokawa, N. Tsukahara, M. Uchida, T. Yamada, T. Yamagata, Y. Yasuda, H. P. Yoshida, R. G. T. Zegers, J. Zenihiro
Nucl.Phys. A738 451 2004.11
Joint Work
-
Structures and Decay of Deep-Hole States in Light Nuclei Populated by the (p, 2p) Reactions Reviewed
M. Yosoi, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hara, K. Y. Hara, T. Ishikawa, M. Itoh, Y. Itow, T. Kawabata, K. Kobayashi, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, Y. Sakemi, M. Shiozawa, H. Takeda, T. Taki, A. Tamii, H. Toyokawa, N. Tsukahara, M. Uchida, T. Yamada, Y. Yasuda, H. P. Yoshida, R. G. T. Zegers
Yad.Fiz. 67 1838 2004.11
Joint Work
-
Trinucleon cluster structures in $^{6}$Li Reviewed
S. Nakayama, T. Yamagata, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, K. Ichihara, K. Kawase, H. Matsui, K. Nakanishi, M. Sakama, M. Tanaka, M. Yosoi
Phys.Rev. C 69 41304 2004.11
Joint Work
-
Tri-nucleon cluster structure in A=6 nuclei above cluster decay threshold Reviewed
H. Akimune, T. Yamagata, S. Nakayama, M. Fujiwara, K. Fushimi, K. Hara, K. Y. Hara, K. Ichihara, K. Kawase, Y. Matsui, K. Nakanishi, A. Shiokawa, M. Tanaka, H. Utsunomiya, M. Yosoi
Nucl.Phys. A738 52 2004.11
Joint Work
-
Trinucleon Cluster Structure at High-Excitation Energies in A = 6 Nuclei Reviewed
H. Akimune, T. Yamagata, S. Nakayama, M. Fujiwara, K. Fushimi, K. Hara, K. Y. Hara, K. Ichihara, K. Kawase, K. Matsui, K. Nakanishi, A. Shiokawa, M. Tanaka, H. Utsunomiya, M. Yosoi
Yad.Fiz. 67 1749 2004.11
Joint Work
-
Nuclear structure of the spin-isospin excited states in $^{13}$N studied via the ($^{3}$He, t) and ($^{3}$He, tp) reactions at 450 MeV Reviewed
H. Fujimura, H. Akimune, I. Daito, M. Fujiwara, K. Hara, K. Y. Hara, M. N. Harakeh, F. Ihara, T. Inomata, K. Ishibashi, T. Ishikawa, T. Kawabata, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamanaka, M. Yosoi
Phys.Rev. C 69 64327 2004.11
Joint Work
-
The effect of deformation in the isoscalar giant dipole resonance Reviewed
M. Itoh, H. Sakaguchi, M. Uchida, T. Ishikawa, T. Kawabata, T. Murakami, H. Takeda, T. Taki, S. Terashima, N. Tsukahara, Y. Yasuda, M. Yosoi, U. Garg, M. Hedden, B. Kharraja, M. Koss, B. K. Nayak, X. Zhu, H. Fujimura, M. Fujiwara, K. Hara, H. P. Yoshida, H. Akimune, M. N. Harakeh, M. Volkerts
Nucl.Phys. A731 41 2004.11
Joint Work
-
Study of the cluster state at E$_{x}$=10.3 MeV in $^{12}$C Reviewed
M. Itoh, H. Akimune, M. Fujiwara, U. Garg, H. Hashimoto, T. Kawabata, K. Kawase, S. Kishi, T. Murakami, K. Nakanishi, Y. Nakatsugawa, B. K. Nayak, S. Okumura, H. Sakaguchi, H. Takeda, S. Terashima, M. Uchida, Y. Yasuda, M. Yosoi, J. Zenihiro
Nucl.Phys. A738 268 2004.11
Joint Work
-
Isovector and isoscalar spin-flip M1 strengths in $^{11}$B Reviewed
T. Kawabata, H. Akimune, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Y. Hara, K. Hatanaka, T. Ishikawa, M. Itoh, J. Kamiya, S. Kishi, M. Nakamura, K. Nakanishi, T. Noro, H. Sakaguchi, Y. Shimbara, H. Takeda, A. Tamii, S. Terashima, H. Toyokawa, M. Uchida, H. Ueno, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
Phys.Rev. C 70 34318 2004.11
Joint Work
-
Weak Isoscalar Response of $^{11}$B Reviewed
T. Kawabata, H. Akimune, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Y. Hara, K. Hatanaka, T. Ishikawa, M. Itoh, J. Kamiya, M. Nakamura, H. Sakaguchi, Y. Shimbara, H. Takeda, A. Tamii, T. Noro, H. Toyokawa, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi
Yad.Fiz. 67 1822 2004.11
Joint Work
-
Neutron-skin thickness in neutron rich isotopes Reviewed
A. Krasznahorkay, H. Akimune, A. M. van den Berg, N. Blasi, S. Brandenburg, M. Csatlos, M. Fujiwara, J. Gulyas, M. N. Harakeh, M. Hunyadi, M. de Huu, Z. Mate, D. Sohler, S. Y. van der Werf, H. J. Wortche, L. Zolnai
Nucl.Phys. A731 224 2004.11
Joint Work
-
t + $^{3}$He molecular structures in $^{6}$Li studied by ($^{3}$He, $\alpha$) reaction at 450 MeV Reviewed
S. Nakayama, T. Yamagata, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, K. Hashimoto, K. Ichihara, K. Kawase, Y. Matsui, K. Nakanishi, M. Sakama, M. Tanaka, M. Yosoi
Nucl.Phys. A731 355 2004.11
Joint Work
-
Tri-nucleon cluster-states in $^{6}$Li Reviewed
S. Nakayama, T. Yamagata, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, H. Hashimoto, K. Ichihara, K. Kawase, Y. Matsui, K. Nakanishi, M. Sakama, M. Tanaka, M. Yosoi
Nucl.Phys. A734 461 2004.11
Joint Work
-
Tri-nucleon cluster-states in 6Li
S Nakayama, T Yamagata, H Akimune, M Fujiwara, K Fushimi, MB Greenfield, K Hara, KY Hara, H Hashimoto, K Ichihara, K Kawase, Y Matsui, K Nakanishi, M Sakama, M Tanaka, M Yosoi
Nucl.Phys. A 734 461 2004.11
Joint Work
-
Structures and Decay of Deep-Hole States in Light Nuclei Populated by the (p, 2p) Reactions
M. Yosoi, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hara, K. Y. Hara, T. Ishikawa, M. Itoh, Y. Itow, T. Kawabata, K. Kobayashi, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, Y. Sakemi, M. Shiozawa, H. Takeda, T. Taki, A. Tamii, H. Toyokawa, N. Tsukahara, M. Uchida, T. Yamada, Y. Yasuda, H. P. Yoshida, R. G. T. Zegers
Yad.Fiz. 67 ( 10 ) 1838 - 1817 2004.11
-
Trinucleon cluster structure at high-excitation energies in A = 6 nuclei
H. Akimune, T. Yamagata, S. Nakayama, M. Fujiwara, K. Fushimi, K. Hara, K. Y. Hara, K. Ichihara, K. Kawase, K. Matsui, K. Nakanishi, A. Shiokawa, M. Tanaka, H. Utsunomiya, M. Yosoi
Physics of Atomic Nuclei 67 ( 9 ) 1721 - 1725 2004.9
Joint Work
Trinucleon molecular structures in 6He and 6Be were investigated by using the 6Li(7Li, 7Be) 6He reaction at 455 MeV and 6Li(3He, t) 6Be reaction at 450 MeV, respectively. Binary decays into t + t from a broad state at Ex = 18.0 ± 1.0 MeV in 6He and into 3He + 3He from one at Ex = 18.0 ± 1.2 MeV in 6Be, respectively, were observed by measuring trinucleon cluster decays in coincidence with reaction particles. The branching ratios for binary decay were estimated to be about 0.7 for 6He and 6Be. These large branching ratios show that a trinucleon cluster state exists as an isobaric partner around Ex = 18 MeV in 6He and 6Be. © 2004 MAIK "Nauka/ Interperiodica".
DOI： 10.1134/1.1806913
Other Link： http://orcid.org/0000-0001-5237-5718
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Isovector and isoscalar spin-flip M1 strengths in B-11
T Kawabata, H Akimune, H Fujimura, H Fujita, Y Fujita, M Fujiwara, K Hara, KY Hara, K Hatanaka, T Ishikawa, M Itoh, J Kamiya, S Kishi, M Nakmura, K Nakanishi, T Noro, H Sakaguchi, Y Shimbara, H Takeda, A Tamii, S Terashima, H Toyokawa, M Uchida, H Ueno, T Wakasa, Y Yasuda, HP Yoshida, M Yosoi
PHYSICAL REVIEW C 70 ( 3 ) 34318 - 03431810 2004.9
Joint Work
Publisher：AMERICAN PHYSICAL SOC
The B-11(He-3,t), and B-11(d,d(')), and B-11(p,p(')) reactions were measured at forward scattering angles including 0degrees to study the isovector and isoscalar spin-flip M1 strengths in B-11. The measured B-11(He-3,t) cross sections were compared with the results of the distorted-wave impulse-approximation (DWIA) calculation, and the Gamow-Teller (GT) strengths for low-lying states in C-11 were determined. The GT strengths were converted to the isovector spin-flip M1 strengths using the isobaric analog relations under the assumption of the isospin symmetry. The isoscalar spin-flip M1 strengths were obtained from the (d,d(')) analysis by assuming that the shape of the collective transition form factor with the same DeltaJ(pi) is similar in the B-11(d,d(')) and C-12(d,d(')) reactions. The obtained isovector and isoscalar strengths were used in the DWIA calculations for the B-11(p,p(')) reaction. The DWIA calculation reasonably well explains the present B-11(p,p(')) result. However, the calculated cross section for the 8.92-MeV 3/2(2)(-) state was significantly smaller than the experimental values. The transition strengths obtained in the shell-model calculations were found to be 20-50 % larger than the experimental strengths. The transition strengths for the neutrino induced reactions were estimated by using the isovector and isoscalar spin-flip M1 strengths. The present results are quantitatively in agreement with the theoretical estimation discussing the axial isoscalar coupling in the neutrino scattering process, and are useful in the measurement of the stellar neutrinos using the neutral- and charged-current reactions on B-11.
DOI： 10.1103/PhysRevC.70.034318
Other Link： http://orcid.org/0000-0001-5237-5718
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Cluster fragmentations of deep(1s)-hole states in light nuclei
M. Yosoi, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, M. Fujiwara, K. Fushimi, K. Hara, K. Y. Hara, H. Hashimoto, T. Ishikawa, M. Itoh, Y. Itow, S. Kishi, T. Kawabata, K. Kawase, M. Kinoshita, K. Kobayashi, M. Nakamura, K. Nakanishi, Y. Nakatsugawa, S. Nakayama, T. Noro, E. Obayashi, S. Okumura, H. Sakaguchi, Y. Sakemi, M. Shiozawa, H. Takeda, T. Taki, A. Tamii, M. Tanaka, S. Terashima, H. Toyokawa, N. Tsukahara, M. Uchida, T. Yamada, T. Yamagata, Y. Yasuda, H. P. Yoshida, R. G.T. Zegers, J. Zenihiro
Nuclear Physics A 738 ( 1-4 SUPPL. ) 451 - 454 2004.6
Joint Work
Decay particles from the s-hole states in 11B, 15N and 6He have been measured in coincidence with the quasifree 12C(p, 2p), 16O(p, 2p) and 7Li(p, 2p) reactions at 392 MeV incident energy. Triton-decay is found to be larger than α-decay for both s-hole states in 11B and 15N despite its smaller Q-value than that, of α-decay. This supports the selection rule predicted by the microscopic SU(3 -model calculations. The relation between the 6He(s-hole) state and the di-triton cluster structure recently found from the charge exchange reaction is briefly discussed. © 2004 Published by Elsevier B.V.
DOI： 10.1016/j.nuclphysa.2004.04.084
Other Link： http://orcid.org/0000-0001-5237-5718
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Giant dipole resonances and the analogs of α-clusters in A=6 and 7 nuclei
T. Yamagata, S. Nakayama, H. Akimune, M. Fujiwara, K. Fushimi, M. B. Greenfield, K. Hara, K. Y. Hara, K. Hashimoto, K. Ichihara, K. Kawase, M. Kinoshita, Y. Matsui, K. Nakanishi, M. Tanaka, H. Utsonomiya, M. Yosoi
Nuclear Physics A 738 ( 1-4 SUPPL. ) 467 - 470 2004.6
Joint Work
The isovector giant dipole resonance (GDR) of an α-cluster in 6Li and 7Li and the analogs in 6,7He and 6,7Be were searched for by using the 6,7Li(p,p′), 6,7Li(3He,t) and 6,7Li(7Li,7Be) reactions at the incident energies of 300, 450 and 455 MeV, respectively. New dipole resonances were found at Ex=27.0±1.5 MeV in 6Li and at Ex=29.0±1.5 MeV in 7Li, both with widths (FWHM) of 12±2 MeV. In 6He, 6Be, 7He, and 7Be, the dipole resonances with widths of 12±2 MeV were observed at Ex=24.0±1.5, 23.5±1.5, 18.0±1.5, and 28.0±1.5 MeV, respectively. Based on the observed excitation energies, widths and cross sections we conclude that the resonances observed in 67Li are the GDR of the α-cluster and the resonances in 6,7He and 6,7Be are the analogs. The Q-value for the excitation of the GDR in the α-cluster in A=7 nuclei is deeper by 1.6±0.3 MeV than that in A=6. © 2004 Elsevier B.V. All right reserved.
DOI： 10.1016/j.nuclphysa.2004.04.088
Other Link： http://orcid.org/0000-0001-5237-5718
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Tri-nucleon cluster structure in A=6 nuclei above cluster decay threshold
H Akimune, T Yamagata, S Nakayama, M Fujiwara, K Fushimi, K Hara, KY Hara, K Ichihara, K Kawase, Y Matsui, K Nakanishi, A Shiokawa, M Tanaka, H Utsunomiya, M Yosoi
NUCLEAR PHYSICS A 738 ( 1-4 SUPPL. ) 52 - 58 2004.6
Joint Work
Publisher：ELSEVIER SCIENCE BV
Tri-nucleon molecular structures in He-6 and Be-6 were investigated by using the Li-6 ((LiBe)-Li-7-Be-7)He-6 reaction at 455 MeV and Li-6(He-3,t)Be-6 reaction at 450 MeV, respectively. Binary decay into t+t from a broad state at E-x = 18.0 +/- 11.0 MeV in He-6 and into He-3+He-3 from one at E-x = 18.0 +/- 1.2 MeV in Be-6, were observed by measuring tri-nucleon cluster-decays in coincidence with reaction-particles. The branching ratios for binary decay were estimated to be about 0.7 for both He-6 and Be-6. From the angular correlations of decay particles, these states are assigned to be P states.
DOI： 10.1016/j.nuclphysa.2004.04.011
Other Link： http://orcid.org/0000-0001-5237-5718
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Study of the cluster state at E-x=10.3 MeV in C-12
M Itoh, H Akimune, M Fujiwara, U Garg, H Hashimooto, T Kawabata, K Kawase, S Kishi, T Murakami, K Nakanishi, Y Nakatsugawa, BK Nayak, S Okumura, H Sakaguchi, H Takeda, S Terashima, M Uchida, Y Yasuda, M Yosoi, J Zenihiro
NUCLEAR PHYSICS A 738 ( 1-4 SUPPL. ) 268 - 272 2004.6
Joint Work
Publisher：ELSEVIER SCIENCE BV
Inelastic scattering from C-12 have been measured using 386 MeV alpha particles to study the alpha-cluster state at E(x)similar to10 MeV. The broad level at E-x=10.3 MeV was assigned to be 0(+). In the alpha-cluster model, the existence of the 2(+) state was predicted in the same energy region. We have analyzed the (alpha,alpha') cross-section data using the multipole decomposition analysis technique and found the 2(+) component submerged in the broad 0(+) state.
DOI： 10.1016/j.nuclphysa.2004.04.044
Other Link： http://orcid.org/0000-0001-5237-5718
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Photonuclear reaction studies at synchrotron radiation facilities in Japan
H Utsunomiya, KY Hara, S Goko, H Akimune, T Yamagata, M Ohta, H Ohgaki, H Toyokawa, T Hayakawa, T Shizuma, P Mohr, YW Lui, H Ohkuma, H Yonehara, K Soutome, M Arnould
NUCLEAR PHYSICS A 738 ( 1-4 SUPPL. ) 136 - 142 2004.6
Joint Work
Publisher：ELSEVIER SCIENCE BV
New gamma-ray beams at synchrotron radiation facilities will give us unprecedented opportunities to study photonuclear reactions of astrophysical interest. Konan University and the Universite Libre de Bruxelles launch a 5-year project, starting in 2004, of constructing an extended NACRE compilation in which photonuclear reactions obtained within a dedicated international effort will be included.
DOI： 10.1016/j.nuclphysa.2004.04.022
Other Link： http://orcid.org/0000-0001-5237-5718
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H Fujimura, H Akimune, Daito, I, M Fujiwara, K Hara, KY Hara, MN Harakeh, F Ihara, T Inomata, K Ishibashi, T Ishikawa, T Kawabata, A Tamii, M Tanaka, H Toyokawa, T Yamanaka, M Yosoi
PHYSICAL REVIEW C 69 ( 6 ) 64327 2004.6
Joint Work
Publisher：AMER PHYSICAL SOC
Spin-isospin excitations in N-13 have been studied by means of the (He-3,t) and (He-3,tp) reactions at a bombarding energy of E(He-3)=450 MeV. The zero-degree (He-3,t) spectrum is found to be similar to those from the (p,n) reactions at intermediate energies, suggesting a simple direct reaction mechanism at E(He-3)=450 MeV. The Gamow-Teller (GT) states with J(pi)=1/2(-) and 3/2(-) have been strongly excited at theta(lab)=0degrees. The angular distribution of cross sections for the C-13(He-3,t)N-13 reaction and the elastic He-3 scattering off C-13 were obtained at theta(lab)=0degrees-17degrees and at theta(lab)=2degrees-22degrees, respectively. The obtained experimental results were compared with calculations performed in distorted-wave Born approximation. Microscopic structures of the states in N-13 have further been studied by observing decay protons in coincidence with high-energy tritons measured at theta(lab)=0degrees. The branching ratios for proton decay from the GT states in N-13 to the final low-lying T=0 states in C-12 were obtained. The wave functions of the excited states in N-13 are discussed on the basis of obtained experimental data and relevant theoretical calculations.
DOI： 10.1103/PhysRevC.69.064327
Other Link： http://orcid.org/0000-0001-5237-5718
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Systematics of the bimodal isoscalar giant dipole resonance
M Uchida, H Sakaguchi, M Itoh, M Yosoi, T Kawabata, Y Yasuda, H Takeda, T Murakami, S Terashima, S Kishi, U Garg, P Boutachkov, M Hedden, B Kharraja, M Koss, BK Nayak, S Zhu, M Fujiwara, H Fujimura, HP Yoshida, K Hara, H Akimune, MN Harakeh
PHYSICAL REVIEW C 69 ( 5 ) 51301 - 1 2004.5
Joint Work
Publisher：AMERICAN PHYSICAL SOC
The systematic behavior of the isoscalar giant dipole resonance (ISGDR) in Zr-90, Sn-116, S-144 m, and Pb-208 is studied with inelastic a scattering at E-alpha=386 MeV. Multipole-decomposition analysis is applied to extract the excitation strengths of giant resonances from the (alpha, alpha') differential cross sections at theta(lab)= 0.64degrees-13.5degrees. The bimodal structure of the ISGDR is discussed and compared with recent theoretical results from Hartree-Fock + random-phase-approximation calculations.
DOI： 10.1103/PhysRevC.69.051301
Other Link： http://orcid.org/0000-0001-5237-5718
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Trinucleon cluster structures in Li-6
S Nakayama, T Yamagata, H Akimune, M Fujiwara, K Fushimi, MB Greenfield, K Hara, KY Hara, H Hashimoto, K Ichihara, K Kawase, H Matsui, K Nakanishi, M Sakama, M Tanaka, M Yosoi
PHYSICAL REVIEW C 69 ( 4 ) 41304 - 1 2004.4
Joint Work
Publisher：AMER PHYSICAL SOC
The t+He-3 cluster structures in Li-6 were investigated by using the Li-7(He-3,alpha) reaction at 450 MeV and at theta(L)=0degrees. A binary decay into t+He-3 with a branching ratio of 0.8+/-0.2 from a broad state at E-x=21 MeV in Li-6 was observed by measuring t and He-3 decay particles. From the measured angular correlations and with the analysis of the spectral shape by using the Breit-Wigner formula, the 21-MeV resonance was decomposed into the P-1 (T=0) state at E-x=18.0+/-0.5 MeV with Gamma(FWHM)=5.0+/-0.5 MeV (where FWHM means full width at half maximum), and the P-3 (T=1) state at E-x=22+/-1 MeV with Gamma=8+/-1 MeV.
DOI： 10.1103/PhysRevC.69.041304
Other Link： http://orcid.org/0000-0001-5237-5718
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Excitations of the alpha cluster in A=6 and 7 nuclei
T Yamagata, S Nakayama, H Akimune, M Fujiwara, K Fushimi, MB Greenfield, K Hara, KY Hara, H Hashimoto, K Ichihara, K Kawase, M Kinoshita, Y Matsui, K Nakanishi, M Tanaka, H Utsunomiya, M Yosoi
PHYSICAL REVIEW C 69 ( 4 ) 44313 - 1 2004.4
Joint Work
Publisher：AMERICAN PHYSICAL SOC
The isovector giant dipole resonance (GDR) of an alpha cluster in Li-6 and Li-7, and its analogs in Be-6,Be-7 and He-6,He-7 were searched for by using the Li-6,Li-7(p,p(')), Li-6,Li-7(He-3,t), and Li-6,Li-7(Li-7,Be-7) reactions at the incident energies of 300, 450, and 455 MeV, respectively. New dipole resonances were found at E-x=27.0+/-1.5 MeV in Li-6 and at E-x=29.0+/-1.5 MeV in Li-7, both with widths (full width at half maximum) of 12+/-2 MeV. In He-6, Be-6, He-7, and Be-7, the dipole resonances with a width of 12+/-2 MeV were observed at E-x=24.0+/-1.5,23.5+/-1.5,18.0+/-1.5, and 28.0+/-1.5 MeV, respectively. The resonance shapes were reproduced well with the GDR shape observed in the He-4(gamma,n) reactions. The averaged value for the ratios of the resonance cross section in A=6 to that in A=7 for each element was 1.2+/-0.3. The averaged value for the ratios of the resonance cross section to the GDR cross section in the respective target nuclei was 0.44+/-0.08, which was consistent with the ratios of the GDR cross section in He-4 to that in Li-6,Li-7 reported in the photonuclear reactions. The excitation energies for the dipole resonances in A=6 and 7 nuclei relative to the separation energies of an alpha particle in Li-6 and Li-7, respectively, agreed well with the excitation energy for the GDR in He-4 (similar to26 MeV). We conclude that the resonances observed in Li-6,Li-7 are consistent with the GDR of the alpha cluster and the resonances in He-6,He-7 and Be-6,Be-7 are consistent with the analogs of the GDR in the alpha cluster. The Q value for the excitation of the GDR of the alpha cluster in A=7 nuclei is deeper by 1.6+/-0.3 MeV on the average than that in A=6.
DOI： 10.1103/PhysRevC.69.044313
Other Link： http://orcid.org/0000-0001-5237-5718
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The effect of deformation in the isoscalar giant dipole resonance
M Itoh, H Sakaguchi, M Uchida, T Ishikawa, T Kawabata, T Murakami, H Takeda, T Taki, S Terashima, N Tsukahara, Y Yasuda, M Yosoi, U Garg, M Hedden, B Kharraja, M Koss, BK Nayak, S Zhu, H Fujimura, M Fujiwara, K Hara, HP Yoshida, H Akimune, MN Harakeh, M Volkerts
NUCLEAR PHYSICS A 731 ( 1-4 ) 41 - 48 2004.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
Background-free inelastic scattering spectra have been obtained for <SUP>144,148,150,152,154</SUP>Sm with 386 MeV alpha particles at forward angles (including 0degrees) to investigate the effect of deformation on the isoscalar giant dipole resonance. The strength distributions for isoscalar giant resonances have been extracted via a multipole decomposition analysis using angular distributions calculated in the framework of the density-dependent single-folding model. The effects of deformation are found to be different for the low- and high-excitation energy components of the isoscalar giant dipole resonance. Evidence has been obtained for the theoretically-predicted mixing between the isoscalar giant dipole resonance and the high energy octupole resonance.
DOI： 10.1016/j.nuclphysa.2003.11.017
Other Link： http://orcid.org/0000-0001-5237-5718
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t+He-3 molecular structures in Li-6 studied by (He-3,alpha) reaction at 450 MeV
S Nakayama, T Yamagata, H Akimune, M Fujiwara, K Fushimi, MB Greenfield, K Hara, KY Hara, K Hashimoto, K Ichihara, K Kawase, Y Matsui, K Nakanishi, M Sakama, M Tanaka, M Yosoi
NUCLEAR PHYSICS A 731 ( 1-4 ) 355 - 362 2004.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
Tri-nucleon cluster-structures in Li-6 were investigated by using the Li-7 (He-3,alpha) reaction at 450 MeV and at theta(L) = 0degrees. A binary decay into t+ He-3 from a broad peak at E-x = 21 MeV was observed. The branching ratio for the binary decay was estimated to be 0.8 +/- 0.2. From the measured angular correlations and the analysis of the spectral shape by using the Breit-Wigner formula, the peak was identified to be composed of two tri-nucleon cluster-states (t + He-3) of the P-1-state at E-x = 18 MeV with a width (FWHM) of 5 MeV and the P-3-state at E-x = 22 MeV with a width of 8 MeV.
DOI： 10.1016/j.nuclphysa.2003.11.048
Other Link： http://orcid.org/0000-0001-5237-5718
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Neutron-skin thickness in neutron-rich isotopes
A Krasznahorkay, H Akimune, AM van den Berg, N Blasi, S Brandenburg, M Csatlos, M Fujiwara, J Gulyas, MN Harakeh, M Hunyadi, M de Huu, Z Mate, D Sohler, SY van der Werf, HJ Wortche, L Zolnai
NUCLEAR PHYSICS A 731 ( 1-4 ) 224 - 234 2004.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
After a short overview of the methods applied for measuring the neutron-skin thickness, we present the recent experimental results for the neutron-skin thicknesses of the Sn112-124 even-even isotopes and of Pb-208. We have used inelastic alpha scattering to excite the giant dipole resonance (GDR). The cross section of this process depends strongly on DeltaR(np)/R, the relative neutron-skin thickness. We have also measured the excitation of the spin-dipole resonance (SDR) to deduce the neutron-skin thickness since the summed L=1 strength of the SDR is sensitive to it. The results obtained are in good agreement with the previous experimental and theoretical ones.
DOI： 10.1016/j.nuclphysa.2003.11.034
Other Link： http://orcid.org/0000-0001-5237-5718
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RGT Zegers, H Abend, H Akimune, AM van den Berg, H Fujimura, H Fujita, Y Fujita, M Fujiwara, S Gales, K Hara, MN Harakeh, T Ishikawa, T Kawabata, K Kawase, T Mibe, K Nakanishi, S Nakayama, H Toyokawa, M Uchida, T Yamagata, K Yamasaki, M Yosoi
NUCLEAR PHYSICS A 731 ( 1-4 ) 121 - 128 2004.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
The excitation and subsequent decay by proton emission of the isovector spin-flip giant monopole resonance are studied via the Pb-208 (He-3, t) reaction at 410 MeV. In the tritonsingles spectrum 60 +/- 5% of the non-energy-weighted sum-rule strength for this 2hw resonance is found in the region 29 < E-x (Bi-208) < 51 MeV. The central excitation energy and width of the IVSGMR are determined to be 37 +/- 1 MeV and 14 +/- 3 MeV, respectively.
DOI： 10.1016/j.nuclphysa.2003.11.024
Other Link： http://orcid.org/0000-0001-5237-5718
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Tri-nucleon cluster structure in 6He and 6Be
Akimune H, Yamagata T, Nakayama S, Fujiwara M, Fushimi K, Hara K, Hara K.Y, Ichihara K, Kawase K, Matsui K, Nakanishi K, Shiokawa A, Tanaka M, Utsunomiya H, Yosoi M
AIP Conference Proceedings 704 253 - 260 2004
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Search for excited α-cluster resonances and their analogs in A=6 and 7 nuclei
Yamagata T, Nakayama S, Akimune H, Fujiwara M, Fushimi K, Greenfield M.B, Hara K, Hara K.Y, Hashimoto K, Ichihara K, Kawase K, Kinoshita M, Matsui Y, Nakanishi K, Tanaka M, Utsunomiya H, Yosoi M
AIP Conference Proceedings 704 261 - 272 2004
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Photoreaction Cross Section Measurements for Astrophysics
Utsunomiya H, Goko S, Hara K.Y, Akimune H, Yamagata T, Ohta M, Ohgaki H, Toyokawa H, Hayakawa T, Shizuma T, Lui Y.-W, Mohr P
AIP Conference Proceedings 704 439 - 446 2004
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H Ohkuma, Y Arimoto, K Kawase, K Tamura, S Suzuki, T Yorita, M Shoji, K Nakanishi, H Akimune, M Fujiwara, S Okajima
CONFERENCE DIGEST OF THE 2004 JOINT 29TH INTERNATIONAL CONFERENCE ON INFRARED AND MILLIMETER WAVES AND 12TH INTERNATIONAL CONFERENCE ON TERAHERTZ ELECTRONICS 789 - 790 2004
Joint Work
Publisher：IEEE
For MeV gamma-ray production by the backward Compton scattering (BCS), a high power optically-pumped far infrared (FIR) laser has been developed at the synchrotron radiation facility of SPring-8. We obtained about 1.6-W of output power of FIR laser at CH3OH 119-mum lasing line pumped by 9P(36) branch line of CO2 laser. We have constructed a test beamline for a production of 10-MeV gamma-ray using an accelerator beam diagnosis beamline. FIR laser photons are injected to the beamline against 8-GeV stored electron beam and produced MeV gamma-rays are extracted to the beamline. We proceed with a gamma-ray production test now at this beamline. It is estimated that the MeV gamma-rays of 103 photons/sec are obtained with FIR output power of 1.6 W at the test beamline. In future plan, the intensity of gamma-ray will reach to 10(7) phtons/sec or more by means of installation of an intense MeV gamma-ray production system by BCS at an another new beamline.
Other Link： http://orcid.org/0000-0001-5237-5718
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Photodisintegration of Deuterium in the Precision Era of Big Bang Nucleosynthesis
Hara K.Y, Utsunomiya H, Akimune H, Goko S, Kudo K, Lui Y.-W, Ohgaki H, Ohta M, Shibata Y, Toyokawa H, Uritani A, Yamagata T
AIP Conference Proceedings 704 551 - 556 2004
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Kawabata T, Akimune H, Fujimura H, Fujita H, Fujita Y, Fujiwara M, Hara K, Hara K.Y, Hatanaka K, Ishikawa T, Itoh M, Kamiya J, Nakamura M, Sakaguchi H, Shimbara Y, Takeda H, Tamii A, Noro T, Toyokawa H, Uchida M, Wakasa T, Yasuda Y, Yoshida H.P, Yosoi M
Physics of Atomic Nuclei 67 ( 10 ) 1974 - 1798 2004
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Systematic study of L <= 3 giant resonances in Sm isotopes via multipole decomposition analysis
M Itoh, H Sakaguchi, M Uchida, T Ishikawa, T Kawabata, T Murakami, H Takeda, T Taki, S Terashima, N Tsukahara, Y Yasuda, A Yosoi, U Garg, M Hedden, B Kharraja, M Koss, BK Nayak, S Zhu, H Fujimura, M Fujiwara, K Hara, HP Yoshida, H Akimune, MN Harakeh, A Volkerts
PHYSICAL REVIEW C 68 ( 6 ) 64602 2003.12
Joint Work
Publisher：AMER PHYSICAL SOC
Background-free inelastic scattering spectra have been obtained for five Sm isotopes with 386-MeV a particles at forward angles (including 0degrees) to investigate the effect of deformation on the compressional-mode giant resonances. The strength distributions for the Lless than or equal to3 isoscalar giant resonances have been extracted via a multipole decomposition analysis using angular distributions calculated in the framework of the density-dependent single-folding model. We observed a splitting of the giant monopole resonance because of its mixing with the giant quadrupole resonance. For the isoscalar giant dipole resonance, the observed effects of deformation are different for the low- and high-excitation-energy components. Evidence has been obtained for the theoretically predicted mixing between the isoscalar giant dipole resonance and the high energy octupole resonance.
DOI： 10.1103/PhysRevC.68.064602
Other Link： http://orcid.org/0000-0001-5237-5718
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Microscopic structure of the Gamow-Teller resonance in 58Cu Reviewed
K. Hara, T. Adachi, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, K. Y. Hara, M. N. Harakeh, K. Ichihara, T. Ishikawa, J. Jänecke, J. Kamiya, T. Kawabata, K. Kawase, K. Nakanishi, Y. Sakemi, Y. Shimbara, Y. Shimizu, M. Uchida, H. P. Yoshida, M. Yosoi, R. G.T. Zegers
Physical Review C - Nuclear Physics 68 ( 6 ) 646121 - 646129 2003.12
Joint Work
The Gamow-Teller (GT) states in 58Cu have been studied via the 58Ni(3He, t+p) and 58Ni(3He, t+γ) coincidence experiments. The GT states in 58Cu at E X=6-12 MeV, where both T=1 and 1=2, 1+ states exist, are excited strongly in the 58Ni(3He, f) reaction at E( 3He)=450 MeV and θ=0°. Proton emissions from the GT states in 58Cu to the hole states in 57Ni have been observed with solid-state detectors in coincidence with high energy tritons measured with a magnetic spectrometer. For the first time, the γ-ray emissions from the excited states in 58Cu and in 37Ni, following the 58Ni(3He, t+p) reaction at intermediate energies, have also been observed in coincidence with tritons. Strengths of proton decay into several neutron-hole states in 57Ni and γ-decay strengths are used to discuss the wave functions of the GT states in 58Cu. The T= 1 and T=2 GT states do only weakly decay into a T=3/2, f7/2-1 neutron-hole state at 5.230 MeV in 57Ni, which is strongly excited via the 58Ni(p, d)57Ni reaction. The wave functions of the T=1 and T=2 GT states with the f7/2-1 neutron-hole configuration are inferred to be strongly coupled to 2p-2h configurations, making fragmented GT strengths in 58Cu.
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Structure and decay of the s-hole state in 11B studied via the 12C(p,2p)11B* reaction
秋宗 秀俊
Phys. Lett. 551B 255 2003.11
Single Work
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Isoscalar giant dipole resonance in 208Pb via inelastic scattering at 400 MeV and nuclear incompressibility
秋宗 秀俊
Phys. Lett. B 557 12-19 2003.11
Single Work
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Excitation and Decay of the Isovector Giant Monopole Resonances
秋宗 秀俊
Phys. Rev. Lett. 90, 202501 2003.11
Single Work
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Evidence for a Narrow S=+1 Baryon Resonance in Photoproduction from the Neutron
秋宗 秀俊
Phys. Rev. Lett. 91, 012002 2003.11
Single Work
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Beam-Polarization Asymmetries for the p(gamma_pol,K+)Lambda and p(gamma_pol,K+)Ksi0 Reactions for E_gamma = 1.5?2.4 GeV
秋宗 秀俊
Phys. Rev. Lett. 91, 092001 2003.11
Single Work
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Di-triton molecular structure in 6He
秋宗 秀俊
Phys. Rev. C 67, 051302R 2003.11
Single Work
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Systematic study of L<=3 giant resonances in Sm isotopes via multipole decomposition analysis
秋宗 秀俊
Phys. Rev. C 68, 064602 2003.11
Single Work
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Microscopic structure of the Gamow-Teller resonance in 58Cu
秋宗 秀俊
Phys. Rev. C 68, 064612 2003.11
Single Work
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Cross section measurement of the 181Ta(γ,n)180Ta reaction around neutron threshold and p-process nucleosynthesis
秋宗 秀俊
Phys. Rev. C67,015807 2003.11
Single Work
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Beam-Polarization Asymmetries for the p($\gamma$(pol), K$^{+}$)$\Lambda$ and p($\gamma$(pol), K$^{+}$)$\Sigma ^{0}$ Reactions for E$_{\gamma}$ = 1.5-2.4 GeV Reviewed
R. G. T. Zegers, M. Sumihama, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hicks, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, H. Kawai, Z. Y. Kim, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsumura, N. Matsuoka, T. Mibe, K. Miwa, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, T. Nakano, M. Niiyama, M. Nomachi, Y. Ohashi, T. Ooba, H. Ohkuma, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, T. Sasaki, P. M. Shagin, Y. Shiino, H. Shimizu, Y. Sugaya, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi
Phys.Rev.Lett. 91 92001 2003.11
Joint Work
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Di-triton molecular structure in $^{6}$He Reviewed
H. Akimune, T. Yamagata, S. Nakayama, Y. Arimoto, M. Fujiwara, K. Fushimi, K. Hara, M. Ohta, A. Shiokawa, M. Tanaka, H. Utsunomiya, K. Y. Hara, H. P. Yoshida, M. Yosoi
Phys.Rev. C 67 51302 2003.11
Joint Work
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Microscopic structure of the Gamow-Teller resonance in $^{58}$Cu Reviewed
K. Hara, T. Adachi, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, K. Y. Hara, M. N. Harakeh, K. Ichihara, T. Ishikawa, J. Janecke, J. Kamiya, T. Kawabata, K. Kawase, K. Nakanishi, Y. Sakemi, Y. Shimbara, Y. Shimizu, M. Uchida, H. P. Yoshida, M. Yosoi, R. G. T. Zegers
Phys.Rev. C 68 64612 2003.11
Joint Work
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Systematic study of L $\le$ 3 giant resonances in Sm isotopes via multipole decomposition analysis Reviewed
M. Itoh, H. Sakaguchi, M. Uchida, T. Ishikawa, T. Kawabata, T. Murakami, H. Takeda, T. Taki, S. Terashima, N. Tsukahara, Y. Yasuda, M. Yosoi, U. Garg, M. Hedden, B. Kharraja, M. Koss, B. K. Nayak, S. Zhu, H. Fujimura, M. Fujiwara, K. Hara, H. P. Yoshida, H. Akimune, M. N. Harakeh, M. Volkerts
Phys.Rev. C 68 64602 2003.11
Joint Work
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Evidence for a Narrow S = +1 Baryon Resonance in Photoproduction from the Neutron Reviewed
T. Nakano, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Date, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hicks, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, H. Kawai, Z. Y. Kim, K. Kino, H. Kohri, N. Kumagai, S. Makino, T. Matsumura, N. Matsuoka, T. Mibe, K. Miwa, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, M. Niiyama, M. Nomachi, Y. Ohashi, T. Ooba, H. Ohkuma, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, T. Sasaki, P. M. Shagin, Y. Shiino, H. Shimizu, Y. Sugaya, M. Sumihama, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G. T. Zegers
Phys.Rev.Lett. 91 12002 2003.11
Joint Work
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Isoscalar giant dipole resonance in $^{208}$Pb via inelastic $\alpha$ scattering at 400 MeV and nuclear incompressibility Reviewed
M. Uchida, H. Sakaguchi, M. Itoh, M. Yosoi, T. Kawabata, H. Y. Yasuda, T. Murakami, T. Ishikawa, T. Taki, N. Tsukahara, S. Terashima, U. Garg, M. Hedden, B. Kharraja, M. Koss, B. K. Nayak, S. Zhu, M. Fujiwara, H. Fujimura, K. Hara, E. Obayashi, H. P. Yoshida, H. Akimune, M. N. Harakeh, M. Volkerts
Phys.Lett. B 557 12 2003.11
Joint Work
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Cross section measurements of the $^{181}$Ta($\gamma$, n)$^{180}$Ta reaction near neutron threshold and the p-process nucleosynthesis Reviewed
H. Utsunomiya, H. Akimune, S. Goko, M. Ohta, H. Ueda, T. Yamagata, K. Yamasaki, H. Ohgaki, H. Toyokawa, Y. -W. Lui, T. Hayakawa, T. Shizuma, E. Khan, S. Goriely
Phys.Rev. C 67 15807 2003.11
Joint Work
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A new astrophysical $\gamma$ probe and its applications Reviewed
H. Utsunomiya, H. Akimune, S. Goko, T. Hayakawa, Y. -W. Lui, H. Ohgaki, M. Ohta, T. Shizuma, H. Toyokawa, T. Yamagata
Nucl.Phys. A718 199c 2003.11
Joint Work
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Structure and decay of the s-hole state in $^{11}$B studied via the $^{12}$C(p, 2p)$^{11}$B$^{*}$ reaction Reviewed
M. Yosoi, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, M. Fujiwara, T. Ishikawa, M. Itoh, T. Kawabata, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, H. Takeda, T. Taki, A. Tamii, H. Toyokawa, N. Tsukahara, M. Uchida, T. Yamada, H. P. Yoshida
Phys.Lett. 551B 255 2003.11
Joint Work
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Excitation and Decay of the Isovector Giant Monopole Resonances via the $^{208}$Pb($^{3}$He, tp)Reaction at 410 MeV Reviewed
R. G. T. Zegers, H. Abend, H. Akimune, A. M. van den Berg, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, S. Gales, K. Hara, M. N. Harakeh, T. Ishikawa, T. Kawabata, K. Kawase, T. Mibe, K. Nakanishi, S. Nakayama, H. Toyokawa, M. Uchida, T. Yamagata, K. Yamasaki, M. Yosoi
Phys.Rev.Lett. 90 202501 2003.11
Joint Work
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Structure and decay of the s-hole state in 11B studied via the 12C(p,2p)11B* reaction
M Yosoi, H Akimune, I Daito, H Ejiri, H Fujimura, M Fujiwara, T Ishikawa, M Itoh, T Kawabata, M Nakamura, T Noro, E Obayashi, H Sakaguchi, H Takeda, T Taki, A Tamii, H Toyokawa, N Tsukahara, M Uchida, T Yamada, HP Yoshida
Phys. Lett. 551 ( 3-4 ) 255 - 261 2003.11
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Microscopic structure of the Gamow-Teller resonance in 58Cu
K Hara, T Adachi, H Akimune, I Daito, H Fujimura, Y Fujita, M Fujiwara, K Fushimi, KY Hara, MN Harakeh, K Ichihara, T Ishikawa, J J_necke, J Kamiya, T Kawabata, K Kawase, K Nakanishi, Y Sakemi, Y Shimbara, Y Shimizu, M Uchida, HP Yoshida, M Yosoi, RGT Zegers
Phys. Rev. C 68 ( 6 ) 64612 2003.11
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Di-triton molecular structure in 6He
H Akimune, T Yamagata, S Nakayama, Y Arimoto, M Fujiwara, K Fushimi, K Hara, M Ohta, A Shiokawa, M Tanaka, H Utsunomiya, KY Hara, HP Yoshida, M Yosoi
Phys. Rev. C 67 ( 5 ) 51302R 2003.11
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Evidence for a Narrow S=+1 Baryon Resonance in Photoproduction from the Neutron
T Nakano, DS Ahn, JK Ahn, H Akimune, Y Asano, WC Chang, S Date, H Ejiri, H Fujimura, M Fujiwara, K Hicks, T Hotta, K Imai, T Ishikawa, T Iwata, H Kawai, ZY Kim, K Kino, H Kohri, N Kumagai, S Makino, T Matsumura, N Matsuoka, T Mibe, K Miwa, M Miyabe, Y Miyachi, M Morita, N Muramatsu, M Niiyama, M Nomachi, Y Ohashi, T Ooba, H Ohkuma, DS Oshuev, C Rangacharyulu, A Sakaguchi, T Sasaki, PM Shagin, Y Shiino, H Shimizu, Y Sugaya, M Sumihama, H Toyokawa, A Wakai, CW Wang, SC Wang, K Yonehara, T Yorita, M Yoshimura, M Yosoi, RGT Zegers
Phys. Rev. Lett. 91 12002 2003.11
Joint Work
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A new astrophysical gamma probe and its applications
H Utsunomiya, H Akimune, S Goko, T Hayakawa, YW Lui, H Ohgaki, M Ohta, T Shizuma, H Toyokawa, T Yamagata
NUCLEAR PHYSICS A 718 ( 1-2 ) 199C - 206C 2003.5
Joint Work
Publisher：ELSEVIER SCIENCE BV
We discuss the properties of gamma beams produced by Compton back-scattering of laser light from relativistic electrons at AIST and SPring-8 and their applications to nuclear astrophysics experiments.
DOI： 10.1016/S0375-9474(03)00715-2
Other Link： http://orcid.org/0000-0001-5237-5718
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M Uchida, H Sakaguchi, M Itoh, M Yosoi, T Kawabata, H Takeda, Y Yasuda, T Murakami, T Ishikawa, T Taki, N Tsukahara, S Terashima, U Garg, M Hedden, B Kharraja, M Koss, BK Nayak, S Zhu, M Fujiwara, H Fujimura, K Hara, E Obayashi, HP Yoshida, H Akimune, MN Harakeh, M Volkerts
PHYSICS LETTERS B 557 ( 1-2 ) 12 - 19 2003.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
The isoscalar giant dipole resonance (ISGDR) in Pb-208 has been investigated with inelastic a-scattering of 400 MeV at extremely forward angles, including 0degrees. Energy spectra, virtually free from instrumental background, have been obtained and the ISGDR strength distribution has been extracted using a multipole-decomposition analysis (MDA). A difference-of-spectra approach yields the same ISGDR centroid energy as with MDA. These results lead to a value for nuclear incompressibility that is consistent for both the isoscalar dipole and monopole modes. (C) 2003 Elsevier Science B.V All rights reserved.
DOI： 10.1016/S0370-2693(03)00137-0
Other Link： http://orcid.org/0000-0001-5237-5718
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H Utsunomiya, H Akimune, S Goko, M Ohta, H Ueda, T Yamagata, K Yamasaki, H Ohgaki, H Toyokawa, YW Lui, T Hayakawa, T Shizuma, E Khan, S Goriely
PHYSICAL REVIEW C 67 ( 1 ) 15807 2003.1
Joint Work
Publisher：AMERICAN PHYSICAL SOC
New measurements of the photoneutron reaction on Ta-181 have been conducted with the AIST-LCS (laser Compton scattering) beam in the 7.8less than or similar toE[MeV]less than or similar to12 energy range. The major advantage of the present gamma-ray experiment is its intense peaking in the energy window of astrophysical interest, i.e., close to the neutron threshold. Details on photon beams from the laser Compton scattering, neutron counting, and experimental determination of the Ta-181 photoneutron cross section are given. The present experimental data are in good agreement with the IAEA evaluation. Reaction rate calculations in the Hauser-Feshbach statistical model are performed and confronted with the experimental data. The data provide constraints on the low-energy tail of the dipole strength function. It is found that among the three different models for the E1-strength considered, only the microscopic quasiparticle random phase approximation model can reproduce the extra strength observed in the Ta-181(gamma,n)Ta-180 reaction at energies of about 8.5 MeV. Such an experiment helps to improve the determination of the corresponding stellar photodisintegration rate of Ta-181 which directly influences the p-process production of Ta-180.
DOI： 10.1103/PhysRevC.67.015807
Other Link： http://orcid.org/0000-0001-5237-5718
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Di-triton molecular structure in 6He
Akimune H, Yamagata T, Nakayama S, Arimoto Y, Fujiwara M, Fushimi K, Hara K, Ohta M, Shiokawa A, Tanaka M, Utsunomiya H, Hara K.Y, Yoshida H.P, Yosoi M.
Physical Review C - Nuclear Physics 67 ( 5 ) 513021 - 513024 2003
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Utsunomiya H, Akimune H, Goko S, Ohta M, Ueda H, Yamagata T, Yamasaki K, Ohgaki H, Toyokawa H, Lui Y.-W, Hayakawa T, Shizuma T, Khan E, Goriely S.
Physical Review C - Nuclear Physics 67 ( 1 ) 158071 - 158079 2003
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Zegers R.G.T, Sumihama M, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Makino S, Matsumura T, Matsuoka N, Mibe T, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M.
Physical Review Letters 91 ( 9 ) 920011 - 920014 2003
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Zegers R.G.T, Sumihama M, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Makino S, Matsumura T, Matsuoka N, Mibe T, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M.
Physical Review Letters 91 ( 9 ) 2003
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Evidence for a Narrow [Formula presented] Baryon Resonance in Photoproduction from the Neutron
Nakano T, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Makino S, Matsumura T, Matsuoka N, Mibe T, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T.
Physical Review Letters 91 ( 1 ) 2003
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Microscopic structure of the Gamow-Teller resonance in 58Cu
Hara K, Adachi T, Akimune H, Daito I, Fujimura H, Fujita Y, Fujiwara M, Fushimi K, Hara K.Y, Harakeh M.N, Ichihara K, Ishikawa T, J{\"a}necke J, Kamiya J, Kawabata T, Kawase K, Nakanishi K, Sakemi Y, Shimbara Y, Shimizu Y, Uchida M, Yoshida H.P, Yosoi M, Zegers R.G.T.
Physical Review C - Nuclear Physics 68 ( 6 ) 646121 - 646129 2003
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Zegers R.G.T, Abend H, Akimune H, van den Berg A.M, Fujimura H, Fujita H, Fujita Y, Fujiwara M, Gal{\`e}s S, Hara K, Harakeh M.N, Ishikawa T, Kawabata T, Kawase K, Mibe T, Nakanishi K, Nakayama S, Toyokawa H, Uchida M, Yamagata T, Yamasaki K, Yosoi M.
Physical Review Letters 90 ( 20 ) 4 2003
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Zegers R.G.T, Abend H, Akimune H, Van Den Berg A.M, Fujimura H, Fujita H, Fujita Y, Fujiwara M, Gal{\`e}s S, Hara K, Harakeh M.N, Ishikawa T, Kawabata T, Kawase K, Mibe T, Nakanishi K, Nakayama S, Toyokawa H, Uchida M, Yamagata T, Yamasaki K, Yosoi M.
Physical Review Letters 90 ( 20 ) 2003
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Systematic study of L≤3 giant resonances in Sm isotopes via multipole decomposition analysis
Itoh M, Sakaguchi H, Uchida M, Ishikawa T, Kawabata T, Murakami T, Takeda H, Taki T, Terashima S, Tsukahara N, Yasuda Y, Yosoi M, Garg U, Hedden M, Kharraja B, Koss M, Nayak B.K, Zhu S, Fujimura H, Fujiwara M, Hara K, Yoshida H.P, Akimune H, Harakeh M.N, Volkerts M
Physical Review C - Nuclear Physics 68 ( 6 ) 646021 - 6460210 2003
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Recent results of LEPS at SPring-8
Nakano T, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Bhang H.C, Chang W.C, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Klein F.J, Kohri H, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Nakamura H, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Seki D, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T
Nuclear Physics A 721 C112 - C117 2003
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Photodisintegration of deuterium and big bang nucleosynthesis
Hara K.Y, Utsunomiya H, Goko S, Akimune H, Yamagata T, Ohta M, Toyokawa H, Kudo K, Uritani A, Shibata Y, Lui Y.-W, Ohgaki H
Physical Review D 68 ( 7 ) 2003
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Evidence for a narrow S = +1 baryon resonance in photoproduction from the neutron
Nakano T, Ahn D.S, Ahn J.K, Akimune H, Asano Y, Chang W.C, Dat{\'e} S, Ejiri H, Fujimura H, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kino K, Kohri H, Kumagai N, Makino S, Matsumura T, Matsuoka N, Mibe T, Miwa K, Miyabe M, Miyachi Y, Morita M, Muramatsu N, Niiyama M, Nomachi M, Ohashi Y, Ooba T, Ohkuma H, Oshuev D.S, Rangacharyulu C, Sakaguchi A, Sasaki T, Shagin P.M, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toyokawa H, Wakai A, Wang C.W, Wang S.C, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers R.G.T
Physical Review Letters 91 ( 1 ) 2003
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Evidence for an exotic S=+1 baryon resonance at a mass of 1540 MeV Reviewed
KH Hicks, DS Ahn, JK Ahn, H Akimune, Y Asano, WC Chang, S Date, H Ejiri, H Fujimura, M Fujiwara, K Hicks, T Hotta, K Imai, T Ishikawa, T Iwata, H Kawai, ZY Kim, K Kino, H Kohri, NK Gai, S Makino, T Matsumura, N Matsuoka, T Mibe, K Miwa, M Miyabe, Y Miyachi, M Morita, N Muramatsu, T Nakano, M Niiyama, M Nomachi, Y Ohashi, T Ooba, H Ohkuma, DS Oshuev, C Rangacharyulu, A Sakaguchi, T Sasaki, R Shagin, Y Shiino, H Shimizu, Y Sugaya, MS Hama, H Toyokawa, A Wakai, CW Wang, SC Wang, K Yonehara, T Yorita, M Yoshimura, M Yosoi, RGT Zegers
INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS 698 539 - 542 2003
Joint Work
Publisher：AMER INST PHYSICS
A new baryon resonance with manifestly exotic strangeness quantum number S = +1 was first observed from the LEPS detector at the SPring-8 facility in Japan. The photoproduction reaction gamman --> K(-)Theta(+) was measured, where the neutron is bound in a C-12 nucleus and the Theta(+) is the new name of this resonance. The existence of the Theta(+) was inferred by observing a peak in the missing mass spectrum of the K-, with the requirement of a coincident K+ in the detector from the decay of the Theta(+). The mass of the resonance is 1.54 +/- 0.01 GeV and a width of < 25 MeV.
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Polarization transfer in the 16O(p,p’) reaction at forward angles and structure of the spin-dipole resonance
秋宗 秀俊
Phys. Rev. C65,064316 2002.11
Single Work
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Compressional-Mode Giant Resonances in Deformed Nuclei
秋宗 秀俊
Phys. Lett. 549B, 58 2002.11
Single Work
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Cluster-Excitations in $^{6}$Li and $^{7}$Li Reviewed
S. Nakayama, T. Yamagata, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, M. B. Greenfield, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa
Prog.Theor.Phys.(Kyoto) Suppl. 146, 603 2002.11
Joint Work
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Neutron-Skin Thickness from Excitation of Spin-Dipole Resonance Reviewed
M. Csatlos, A. Krasznahorkay, A. M. van den Berg, M. N. Harakeh, M. A. de Huu, S. Y. van der Werf, M. Hagemann, H. Akimune, H. Fujimura, M. Fujiwara, K. Hara, T. Ishikawa
Acta Phys.Pol. B33 331 2002.11
Joint Work
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Compressional-Mode Giant Resonances in Deformed Nuclei Reviewed
M. Itoh, H. Sakaguchi, M. Uchida, T. Ishikawa, T. Kawabata, T. Murakami, H. Takeda, T. Taki, S. Terashima, N. Tsukahara, Y. Yasuda, M. Yosoi, U. Garg, M. Hedden, B. Kharraja, M. Koss, B. K. Nayak, S. Zhu, H. Fujimura, M. Fujiwara, K. Hara, H. P. Yoshida, H. Akimune, M. N. Harakeh, M. Volkerts
Phys.Lett. 549B 58 2002.11
Joint Work
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Polarization Transfer in the $^{16}$O(p, p') Reaction at Forward Angles and Structure of the Spin-Dipole Resonances Reviewed
T. Kawabata, T. Ishikawa, M. Itoh, M. Nakamura, H. Sakaguchi, H. Takeda, T. Taki, M. Uchida, Y. Yasuda, M. Yosoi, H. Akimune, K. Yamasaki, G. P. A. Berg, H. Fujimura, K. Hara, K. Hatanaka, J. Kamiya, T. Noro, E. Obayashi, T. Wakasa, H. P. Yoshida, B. A. Brown, H. Fujita, Y. Fujita, Y. Shimbara, H. Ueno, M. Fujiwara, K. Hosono, A. Tamii, H. Toyokawa
Phys.Rev. C65 64316 2002.11
Joint Work
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T. Kawabata, T. Ishikawa, M. Itoh, M. Nakamura, H. Sakaguchi, H. Takeda, T. Taki, M. Uchida, Y. Yasuda, M. Yosoi, H. Akimune, K. Yamasaki, G. P. A. Berg, H. Fujimura, K. Hara, K. Hatanaka, J. Kamiya, T. Noro, E. Obayashi, T. Wakasa, H. P. Yoshida, B. A. Brown, H. Fujita, Y. Fujita, Y. Shimbara, H. Ueno, M. Fujiwara, K. Hosono, A. Tamii, H. Toyokawa
Phys.Rev. C65 ( 6 ) 64316 2002.11
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Compressional-mode giant resonances in deformed nuclei
M Itoh, H Sakaguchi, M Uchida, T Ishikawa, T Kawabata, T Murakami, H Takeda, T Taki, S Terashima, N Tsukahara, Y Yasuda, M Yosoi, U Garg, M Hedden, B Kharraja, M Koss, BK Nayak, S Zhu, H Fujimura, M Fujiwara, K Hara, HP Yoshida, H Akimune, MN Harakeh, M Volkerts
PHYSICS LETTERS B 549 ( 1-2 ) 58 - 63 2002.11
Joint Work
Publisher：ELSEVIER SCIENCE BV
Background-free inelastic scattering spectra have been obtained for the Sm isotopes with 400 MeV alpha particles at forward angles (including 0degrees) to investigate the effect of deformation on the compressional-mode giant resonances. The strength distributions for the isoscalar giant resonances (L < 3) have been extracted for the spherical nucleus Sm-144 and the deformed nucleus (SM)-S-154. We have observed that the effects of deformation are different for the low- and high-excitation-energy components of the isoscalar giant dipole resonance in Sm-154. Evidence for the theoretically predicted coupling between the isoscalar dipole resonance and the high-energy octupole resonance is reported. (C) 2002 Elsevier Science B.V. All rights reserved.
DOI： 10.1016/S0370-2693(02)02892-7
Other Link： http://orcid.org/0000-0001-5237-5718
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Evidence for the di-triton resonance in 6He Reviewed
H. Akimune, T. Yamagata, Shintaro Nakayama, Y. Arimoto, M. Fujiwara, Ken-Ichi Fushimi, K. Hara, M. Ohta, A. Shiokawa, M. Tanaka, K. Yamasaki, P. H. Yoshida, M. Yosoi, H. Utsunomiya
Proceedings of Int. Symp. on Clustering aspects of quantum many-body systems 19 - 22 2002.2
Joint Work
6Heのt+tクラスター分子状態を(7Li,7Be)反応で励起された共鳴状態からのt粒子崩壊過程を測定して調べた.励起エネルギーEx=18 MeVにt+tと考えられる分子共鳴を見つけた.t粒子崩壊分岐比は90±10%で,tの2体崩壊していることが分かった.
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Neutron-skin thickness from excitation of spin-dipole resonance
M Csatlos, A Krasznahorkay, AM Van den Berg, MN Harakeh, MA De Huu, SY Van der Werf, M Hagemann, H Akimune, H Fujimura, M Fujiwara, K Hara, T Ishikawa
ACTA PHYSICA POLONICA B 33 ( 1 ) 331 - 336 2002.1
Joint Work
Publisher：WYDAWNICTWO UNIWERSYTETU JAGIELLONSKIEGO
A new method, based on the excitation of the giant (spin-dipole) resonances in charge-exchange reactions, for studying the neutron-skin thickness has been tested. For a precise experimental test the (He-3,t) reaction on even Sn isotopes has been used. The results obtained are in good agreement with previous neutron-skin thickness values provided by other experimental and theoretical methods.
Other Link： http://orcid.org/0000-0001-5237-5718
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Cluster-excitations in 6Li and 7Li
Nakayama S, Yamagata T, Akimune H, Daito I, Fujimura H, Fujita Y, Fujiwara M, Fushimi K.-I, Greenfield M.B, Kohri H, Koori N, Takahisa K, Tamii A, Tanaka M, Toyokawa H.
Progress of Theoretical Physics ( 146 SUPPL. ) 603 - 604 2002
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Kawabata T, Ishikawa T, Itoh M, Nakamura M, Sakaguchi H, Takeda H, Taki T, Uchida M, Yasuda Y, Yosoi M, Akimune H, Yamasaki K, Berg G.P.A, Fujimura H, Hara K, Hatanaka K, Kamiya J, Noro T, Obayashi E, Wakasa T, Yoshida H.P, Brown B.A, Fujita H, Fujita Y, Shimbara Y, Ueno H, Fujiwara M, Hosono K, Tamii A, Toyokawa H
Physical Review C - Nuclear Physics 65 ( 6 ) 643161 - 6431612 2002
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Photoneutron cross sections for nuclear astrophysics
Utsunomiya H, Akimune H, Goko S, Yamagata T, Ohta M, Ohgaki H, Toyokawa H, Sumiyoshi K, Lui Y
Journal of Nuclear Science and Technology 39 542 - 545 2002
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Distribution of the Gamow-Teller strength in Nb-90 and Bi-208
A Krasznahorkay, H Akimune, M Fujiwara, MN Harakeh, J Janecke, VA Rodin, MH Urin, M Yosoi
PHYSICAL REVIEW C 64 ( 6 ) 67302 - 673024 2001.12
Joint Work
Publisher：AMER PHYSICAL SOC
The (He-3,t) charge-exchange reaction has been studied at E(He-3)=450 MeV and angles near 0 degrees on targets of Zr-90 and Pb-208. Fragmentation of the Gamow-Teller (GT) strength into separate components of the particle-hole type has been observed. The distribution of the GT strength in Nb-90 and in Bi-208 has been calculated within the continuum quasiparticle random phase approximation and continuum-random-phase approximation approaches, respectively. These components, especially in Pb-208, could be related with the direct, core polarization, and back-spin-flip Gamow-Teller strength.
DOI： 10.1103/PhysRevC.64.067302
Other Link： http://orcid.org/0000-0001-5237-5718
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Elastic Proton Scattering from $^{4}$He at 297 MeV Reviewed
M. Yoshimura, M. Nakamura, H. Akimune, I. Daito, T. Inomata, M. Itoh, M. Kawabata, T. Noro, H. Sakaguchi, H. Takeda, A. Tamii, K. Yonehara, H. P. Yoshida, M. Yosoi
Phys.Rev. C63 34618 2001.11
Joint Work
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Evidence for a 3.8 MeV State in $^{9}$B Reviewed
H. Akimune, M. Fujimura, M. Fujiwara, K. Hara, T. Ishikawa, T. Kawabata, H. Utsunomiya, T. Yamagata, K. Yamasaki, M. Yosoi
Phys.Rev. C64 41305 2001.11
Joint Work
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A New Method to Measure the Neutron Skin Reviewed
M. Csatlos, A. Krasznahorkay, A. M. van den Berg, M. N. Harakeh, S. Y. van der Werf, M. Hagemann, M. de Huu, H. Akimune, H. Fujimura, M. Fujiwara, K. Hara, T. Ishikawa
Acta Phys.Hung.N.S. 13 203 2001.11
Joint Work
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Isospin Symmetry-Structure Study at New High-Resolution Course of RCNP Reviewed
Y. Fujita, T. Adachi, H. Akimune, A. D. Bacher, G. P. A. Berg, T. Black, I. Daito, C. C. Foster, H. Fujimura, H. Fujita, M. Fujiwara, K. Hara, K. Harada, M. N. Harakeh, K. Hatanaka, T. Inomata, J. Janecke, J. Kamiya, Y. Kanzaki, K. Katori, T. Kawabata, W. Lozowski, K. Nagayama, T. Noro, D. A. Roberts, H. Sakaguchi, Y. Shimbara, T. Shinada, E. J. Stephenson, A. Tamii, K. Tamura, M. Tanaka, H. Ueno, T. Wakasa, T. Yamanaka, M. Yoshifuku, M. Yosoi
Nucl.Phys. A687 311c 2001.11
Joint Work
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Study of Giant Monopole Resonance in $^{58}$Ni via the (p(pol), p(pol)') Reaction at 0$^\circ$ Reviewed
T. Ishikawa, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Hatanaka, K. Hosono, F. Ihara, M. Itoh, T. Kawabata, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, A. Tamii, H. Takeda, T. Taki, H. Toyokawa, H. P. Yoshida, M. Yoshimura, M. Yosoi
Nucl.Phys. A687 58c 2001.11
Joint Work
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Direct and Statistical Proton Decay from Isovector Giant Resonances in $^{90}$Nb Reviewed
J. Janecke, H. Akimune, H. Ejiri, R. Fox, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, R. Hazama, T. Inomata, N. Kudomi, K. Pham, D. A. Roberts, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Nucl.Phys. A687 270c 2001.11
Joint Work
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Thin Ice Target for $^{16}$O(p, p') Experiment Reviewed
T. Kawabata, H. Akimune, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, K. Hosono, T. Ishikawa, M. Itoh, J. Kamiya, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, Y. Shimbara, H. Takeda, T. Taki, A. Tamii, H. Toyokawa, N. Tsukahara, M. Uchida, H. Ueno, T. Wakasa, K. Yamasaki, Y. Yasuda, H. P. Yoshida, M. Yosoi
Nucl.Instrum.Methods Phys.Res. A459 171 2001.11
Joint Work
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Distribution of the Gamow-Teller Strength in $^{90}$Nb and $^{208}$Bi Reviewed
A. Krasznahorkay, H. Akimune, M. Fujiwara, M. N. Harakeh, J. Janecke, V. A. Rodin, M. H. Urin, M. Yosoi
Phys.Rev. C64 67302 2001.11
Joint Work
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Multi-GeV Laser-Electron Photon Project at SPring-8 Reviewed
T. Nakano, J. K. Ahn, M. Fujiwara, H. Kohri, N. Matsuoka, T. Mibe, N. Muramatsu, M. Nomachi, H. Shimizu, K. Yonehara, M. Yosoi, T. Yorita, W. C. Chang, C. W. Wang, S. C. Wang, Y. Asano, T. Hotta, Y. Sugaya, R. Zegers, S. Date, N. Kumagai, Y. Ohashi, H. Ohkuma, H. Toyokawa, T. Iwata, M. Miyabe, Y. Miyachi, A. Wakai, K. Imai, T. Ishikawa, M. Miyabe, T. Sasaki, H. Kawai, T. Ooba, Y. Shiino, M. Wada, H. C. Bhang, Z. Y. Kim, A. Sakaguchi, M. Sumihama, K. Hicks, H. Akimune, T. Matsumura, C. Rangacharyulu, S. Makino
Nucl.Phys. A684 71c 2001.11
Joint Work
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Dipole Excitation of $\alpha$ Clusters in $^{6}$Li and $^{7}$Li Reviewed
S. Nakayama, T. Yamagata, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, M. B. Greenfield, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa
Phys.Rev.Lett. 87 122502 2001.11
Joint Work
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Photodisintegration of $^{9}$Be with Laser-Induced Compton Backscattered $\gamma$ Rays Reviewed
H. Utsunomiya, Y. Yonezawa, H. Akimune, T. Yamagata, M. Ohta, M. Fujishiro, H. Toyokawa, H. Ohgaki
Phys.Rev. C63 18801 2001.11
Joint Work
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Photodisintegration of $^{9}$Be and the Reaction Rate for $\alpha$($\alpha$n, $\gamma$)$^{9}$Be Reviewed
H. Utsunomiya, Y. Yonezawa, H. Akimune, T. Yamagata, M. Ohta, H. Toyokawa, H. Ohgaki, K. Sumiyoshi
Nucl.Phys. A688 340c 2001.11
Joint Work
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Structure of 11 / 2$^{-}$ Analog State in $^{91}$Nb Populated by the $^{90}$Zr($\alpha$, t) Reaction Reviewed
H. K. T. van der Molen, H. Akimune, A. M. van den Berg, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, M. N. Harakeh, F. Ihara, T. Inomata, K. Ishibashi, J. Janecke, N. Kalantar-Nayestanaki, H. Laurent, I. Lhenry, T. W. O'Donnell, V. A. Rodin, A. Tamii, H. Toyokawa, M. H. Urin, H. Yoshida, M. Yosoi
Phys.Lett. 502B 1 2001.11
Joint Work
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Collective and Single-Particle States at High Excitation Energy Reviewed
A. M. van den Berg, H. Akimune, I. Daito, H. Fujimura, M. Fujiwara, Y. Fujita, M. N. Harakeh, F. Ihara, T. Inomata, K. Ishibashi, J. Janecke, N. Kalantar-Nayestanaki, H. Laurent, I. Lhenry, H. K. T. van der Molen, T. O'Donnell, V. A. Rodin, A. Tamii, H. Toyokawa, M. H. Urin, H. Yoshida, M. Yosoi
Acta Phys.Hung.N.S. 13 21 2001.11
Joint Work
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Structure of 11 / 2$^{-}$ Analog State in $^{91}$Nb Populated by the $^{90}$Zr($\alpha$, t) Reaction
H. K. T, van, der Molen, H. Akimune, A. M. van, den Berg, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, M. N. Harakeh, F. Ihara, T. Inomata, K. Ishibashi, J. Janecke, N. Kalantar-Nayestanaki, H. Laurent, I. Lhenry, T. W. O'Donnell, V. A. Rodin, A. Tamii, H. Toyokawa, M. H. Urin, H. Yoshida, M. Yosoi
Phys.Lett. 502B ( 1-4 ) 1 - 8 2001.11
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Dipole Excitation of α Clusters in 6Li and 7Li
Nakayama S, Yamagata T, Akimune H, Daito I, Fujimura H, Fujita Y, Fujiwara M, Fushimi K, Greenfield M.B, Kohri H, Koori N, Takahisa K, Tamii A, Tanaka M, Toyokawa H.
Physical Review Letters 87 ( 12 ) 2001
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Elastic proton scattering from 4He at 297 MeV
Yoshimura M, Nakamura M, Akimune H, Daito I, Inomata T, Itoh M, Kawabata M, Noro T, Sakaguchi H, Takeda H, Tamii A, Yonehara K, Yoshida H.P, Yosoi M.
Physical Review C - Nuclear Physics 63 ( 3 ) 346181 - 3461811 2001
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Direct and statistical proton decay from isovector giant resonances in90Nb
J{\"a}necke J, Akimune H, Ejiri H, Fox R, Fujita Y, Fujiwara M, Greenfield M.B, Harakeh M.N, Hazama R, Inomata T, Kudomi N, Pham K, Roberts D.A, Tamii A, Tanaka M, Toyokawa H, Yosoi M.
Nuclear Physics A 687 ( 1-2 ) 270 - 275 2001
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Evidence for a 3.8 MeV state in 9B
Akimune H, Fujimura M, Fujiwara M, Hara K, Ishikawa T, Kawabata T, Utsunomiya H, Yamagata T, Yamasaki K, Yosoi M.
Physical Review C - Nuclear Physics 64 ( 4 ) 413051 - 413054 2001
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Evidence for a 3.8 MeV state in [Formula Presented]
Akimune H, Fujimura M, Fujiwara M, Hara K, Ishikawa T, Kawabata T, Utsunomiya H, Yamagata T, Yamasaki K, Yosoi M.
Physical Review C - Nuclear Physics 64 ( 4 ) 4 2001
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Study of giant monopole resonance in58Ni via the (p→,p→/) reaction at 0°
Ishikawa T, Akimune H, Daito I, Fujimura H, Fujita Y, Fujiwara M, Hatanaka K, Hosono K, Ihara F, Itoh M, Kawabata T, Nakamura M, Noro T, Obayashi E, Sakaguchi H, Tamii A, Takeda H, Taki T, Toyokawa H, Yoshida H.P, Yoshimura M, Yosoi M
Nuclear Physics A 687 ( 1-2 ) 58 - 63 2001
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Isospin symmetry-structure study at new high-resolution course of RCNP
Fujita Y, Adachi T, Akimune H, Bacher A.D, Berg G.P.A, Black T, Daito I, Foster C.C, Fujimura H, Fujita H, Fujiwara M, Hara K, Harada K, Harakeh M.N, Hatanaka K, Inomata T, J{\"a}necke J, Kamiya J, Kanzaki Y, Katori K, Kawabata T, Lozowski W, Nagayama K, Noro T, Roberts D.A, Sakaguchi H, Shimbara Y, Shinada T, Stephenson E.J, Tamii A, Tamura K, Tanaka M, Ueno H, Wakasa T, Yamanaka T, Yoshifuku M, Yosoi M
Nuclear Physics A 687 ( 1-2 ) 311 - 320 2001
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Reaction Mechanism of $^{6}$Li Scattering at 600 MeV Reviewed
K. Schwarz, C. Samanta, M. Fujiwara, H. Rebel, R. De Leo, N. Matsuoka, H. Utsunomiya, H. Akimune, I. Daito, H. Fujimura, F. Ihara, K. Ishibashi, Y. Maeda, T. Yamanaka, H. Yoshida, A. Okihana, T. Yoshimura, P. K. J. van Aarle, W. A. T. Uijen, M. Ito, Y. Sakuragi
Eur.Phys.J. A 7 367 2000.11
Joint Work
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Direct Proton Decay and Microscopic Structure of the Spin-Dipole Resonance in $^{208}$Bi Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. N. Harakeh, J. Janecke, M. Yosoi
Phys.Rev. C61 11304 2000.11
Joint Work
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Gamow-Teller Strengths of the Inverse Beta Transition $^{176}$Yb $\to$ $^{176}$Lu for Spectroscopy of Proton-Proton and Other Sub-MeV Solar Neutrinos Reviewed
M. Fujiwara, H. Akimune, A. M. van den Berg, M. Cribier, I. Daito, H. Ejiri, H. Fujimura, Y. Fujita, C. D. Goodman, K. Hara, M. N. Harakeh, F. Ihara, T. Ishikawa, J. Janecke, T. Kawabata, R. S. Raghavan, K. Schwarz, M. Tanaka, T. Yamanaka, M. Yosoi, R. G. T. Zegers
Phys.Rev.Lett. 85 4442 2000.11
Joint Work
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Experiment at SPring-8 Reviewed
T. Nakano, J. K. Ahn, H. Ejiri, M. Fujiwara, T. Hotta, N. Matsuoka, T. Matsumura, T. Mibe, M. Nomachi, H. Toki, C. W. Wang, S. C. Wang, H. Kawai, T. Ooba, T. Iwata, Y. Miyachi, T. Toyama, A. Wakai, K. Hicks, H. Akimune, Y. Asano, Y. Sugaya, S. Date, N. Kumagai, Y. Ohashi, H. Toyokawa, K. Imai, M. Yosoi, A. Ichikawa, T. Kishimoto, A. Sakaguchi, M. Sumihama, S. Makino, H. Shimizu
Nucl.Phys. A670 332c 2000.11
Joint Work
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Soft Dipole Resonance in the Neutron-Skin Nucleus $^{6}$He Reviewed
S. Nakayama, T. Yamagata, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, T. Inomata, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa
Phys.Rev.Lett. 85 262 2000.11
Joint Work
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In-Medium NN Interactions and Nucleon and Meson Masses Studied with Nucleon Knockout Reactions Reviewed
T. Noro, H. Akimune, H. Akiyoshi, I. Daito, H. Fujimura, K. Hatanaka, F. Ihara, T. Ishikawa, M. Ito, M. Kawabata, T. Kawabata, Y. Maeda, N. Matsuoka, S. Morinobu, M. Nakamura, E. Obayashi, A. Okihana, K. Sagara, H. Sakaguchi, H. Takeda, T. Taki, A. Tamii, K. Tamura, H. Yamazaki, H. Yoshida, M. Yoshimura, M. Yosoi
Nucl.Phys. A663-664 517c 2000.11
Joint Work
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Reaction mechanism of Li-6 scattering at 600 MeV
K Schwarz, C Samanta, M Fujiwara, H Rebel, R De Leo, N Matsuoka, H Utsunomiya, H Akimune, Daito, I, H Fujimura, F Ihara, K Ishibashi, Y Maeda, T Yamanaka, H Yoshida, A Okihana, T Yoshimura, PKJ van Aarle, WAT Uijen, M Ito, Y Sakuragi
EUROPEAN PHYSICAL JOURNAL A 7 ( 3 ) 367 - 375 2000.3
Joint Work
Publisher：SPRINGER
Elastic scattering and inclusive breakup of Li-6 particles on C-12 Ni-58, Zr-90, and Pb-208 targets are measured at 100A MeV. The elastic scattering data are compared with single channel and Coupled Discretized Continuum Channels calculations. The coupling-effect between the elastic and the breakup channels is important even at an incident energy of 100A MeV and cannot be neglected. The inclusive breakup data are investigated for orbital dispersion effects which are found to be less significant at 100A MeV. The longitudinal momentum distributions are broader than predicted by theoretical expectations.
DOI： 10.1007/PL00013619
Other Link： http://orcid.org/0000-0001-5237-5718
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An Ice Target System for 16O(p,p') Measurement Reviewed
T. Kawabata, H. Akimune, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, K. Hososno, T. Ishikawa, M. Itoh, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, Y. Shimbara, H. Takeda, T. Taki, A. Tamii, H. Toyokawa, N. Tsukahara, M. Uchida, H. Ueno, T. Wakasa, K. Yamasaki, Y. Yasuda, H. P. Yoshida, M. Yosoi
Proceedings of Workshop on Frontiers in Nuclear Physics 131 - 141 2000.2
Joint Work
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Direct proton decay and microscopic structure of the spin-dipole resonance in 208Bi
Akimune H, Daito I, Fujita Y, Fujiwara M, Harakeh M.N, J{\"a}necke J, Yosoi M.
Physical Review C - Nuclear Physics 61 ( 1 ) 113041 - 113044 2000
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Excitation and decay of spin-isospin modes in charge-exchange reactions Reviewed
M Fujiwara, H Akimune, Daito, I, Y Fujita, MN Harakeh, J Janecke, M Yosoi
INTERNATIONAL SYMPOSIUM ON QUASIPARTICLE AND PHONON EXCITATIONS IN NUCLEI (SOLOVIEV 99) 78 - 85 2000
Joint Work
Publisher：WORLD SCIENTIFIC PUBL CO PTE LTD
Proton decay from the spin-dipole resonance (SDR) at E-x=21.1 MeV in Bi-208 has been studied in the Pb-208(He-3,t)Bi-208 reaction at E(He-3)=450 MeV. Protons emitted due to the decay of the SDR were measured in solid-state detectors in coincidence with tritons detected with the spectrometer "Grand Raiden". The total and partial branching ratios for proton decay from the SDR to the residual neutron-hole states in (207)pb have been measured. The deduced escape widths are found to be in good agreement with the results from theoretical calculations.
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DAQ system for LEPS experiment
Sugaya Y, Ahn J.K, Akimune H, Asano Y, Chang W.C, Date S, Fujiwara M, Hicks K, Hotta T, Imai K, Ishikawa T, Iwata T, Kawai H, Kim Z.Y, Kishimoto Y, Kumagai N, Makino S, Matsukoka N, Matsumura T, Mibe T, Minami S, Miyabe M, Miyachi Y, Nakano T, Nomachi M, Ohashi Y, Ooba T, Rangacharylu C, Sakaguchi A, Sasaki T, Seki D, Shimizu H, Sumihama M, Toki H, Toyama T, Toyokawa H, Wakai A, Wang C.W, Wang W.C, Yonehara T, Yorita T, Yosoi M
IEEE Nuclear Science Symposium and Medical Imaging Conference 2 2000
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Polarization Transfer Observables for Proton Inelastic Scattering from $^{12}$C at 0$^\circ$ Reviewed
A. Tamii, H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, K. Hatanaka, K. Hosono, F. Ihara, T. Inomata, T. Ishikawa, M. Itoh, M. Kawabata, T. Kawabata, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, H. Takeda, T. Taki, H. Toyokawa, H. P. Yoshida, M. Yoshimura, M. Yosoi
Phys.Lett. 459B 61 1999.11
Joint Work
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Isovector Electric Monopole Resonance in $^{60}$Ni Reviewed
S. Nakayama, H. Akimune, Y. Arimoto, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, H. Kohri, N. Koori, K. Takahisa, T. Takeuchi, A. Tamii, M. Tanaka, T. Yamagata, Y. Yamamoto, K. Yonehara, H. Yoshida
Phys.Rev.Lett. 83 690 1999.11
Joint Work
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Gamow-Teller Transitions in the ($^{7}$Li, $^{7}$Be) Reaction at 65A MeV Reviewed
S. Nakayama, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, T. Inomata, K. Ishibashi, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamagata
Phys.Rev. C60 47303 1999.11
Joint Work
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Charge-Exchange Reactions with a Secondary Triton Beam Reviewed
B. M. Sherrill, H. Akimune, S. M. Austin, D. Bazin, A. M. van den Berg, G. P. A. Berg, J. Caggiano, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Hara, M. N. Harakeh, J. Janecke, T. Kawabata, A. Navin, D. A. Roberts, M. Steiner
Nucl.Instrum.Methods Phys.Res. A432 299 1999.11
Joint Work
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Excitation of Isovector Spin-Dipole Resonances and Neutron Skin of Nuclei Reviewed
A. Kraznahorkay, M. Fujiwara, P. van Aarle, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. N. Harakeh, T. Inomata, J. Janecke, S. Nakayama, A. Tamii, M. Tanaka, H. Toyokawa, W. Uijen, M. Yosoi
Phys.Rev.Lett. 82 3216 1999.11
Joint Work
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Mirror-Symmetry Structure of A = 27, T = 1 / 2 Nuclei Studied Through Strong, Weak, and Electromagnetic Interactions Reviewed
Y. Fujita, H. Akimune, I. Daito, H. Fujimura, M. Fujiwara, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, A. Tamii, M. Tanaka, H. Ueno, M. Yosoi
Phys.Rev. C59 90 1999.11
Joint Work
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Magnetic spectrometer Grand Raiden Reviewed
M Fujiwara, H Akimune, Daito, I, H Fujimura, Y Fujita, K Hatanaka, H Ikegami, Katayama, I, K Nagayama, N Matsuoka, S Morinobu, T Noro, M Yoshimura, H Sakaguchi, Y Sakemi, A Tamii, M Yosoi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 422 ( 1-3 ) 484 - 488 1999.2
Joint Work
Publisher：ELSEVIER SCIENCE BV
A high-resolution magnetic spectrometer called "Grand Raiden" is operated at the RCNP ring cyclotron facility in Osaka for nuclear physics studies at intermediate energies. This magnetic spectrometer has excellent ion-optical properties. In the design of the spectrometer, the second-order dispersion matching condition has been taken into account, and almost all the aberration terms such as (x\theta(3)), (x\theta phi(2)), (x\theta(2)delta) and (x\theta delta(2)) in a third-order matrix calculation are optimized. A large magnetic rigidity of the spectrometer (K = 1400 MeV) gives a great advantage to measure the charge-exchange (He-3, t) reactions at 450 MeV. The ability of the high-resolution measurement has been demonstrated. Various coincidence measurements are performed to study the nuclear structures of highly excited states through decay properties of nuclear levels following nuclear reactions at intermediate energies. (C) 1999 Elsevier Science B.V. All rights reserved.
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Isovector electric monopole resonance in 60 Ni
S. Nakayama, H. Akimune, Y. Arimoto, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, H. Kohri, N. Koori, K. Takahisa, T. Takeuchi, A. Tamii, M. Tanaka, T. Yamagata, Y. Yamamoto, K. Yonehara, H. Yoshidame
Physical Review Letters 83 ( 4 ) 690 - 693 1999.1
Joint Work
The isovector electric monopole resonance (IVMR) was studied by the 60Ni(7Li, 7 Be)60Co reaction at 65A MeV and at forward scattering angles including zero degrees. We confirmed the existence of the IVMR at an excitation energy of 20 ± 2 MeV with a width of 10 ± 2 MeV in 60Co, which is an analog of the T0+1 isospin component of the IVMR estimated at Ex ≈ 31 MeV in 60Ni. The result presently obtained is consistent with previous results using the pion charge-exchange reaction. © 1999 The American Physical Society.
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Excitation of isovector spin-dipole resonances and neutron skin of nuclei Reviewed
A. Krasznahorkay, M. Fujiwara, P. van Aarle, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. N. Harakeh, T. Inomata, J. Jänecke, S. Nakayama, A. Tamii, M. Tanaka, H. Toyokawa, W. Uijen, M. Yosoi
Physical Review Letters 82 ( 16 ) 3216 - 3219 1999
Joint Work
The cross sections of the isovector spin-dipole resonances (SDR) in the Sb isotopes excited by the (3He, t) charge-exchange reaction at 450 MeV for 0° ≤ θt ≤ 1.15° have been measured. The results are compared with the predicted sum-rule strengths related to the difference of neutron and proton root-mean-square radii. Within the model used, the radii differences (neutron-skin thicknesses) deduced for 114Sn, 116Sn, 118Sn, 122Sn, and 124Sn are ≤0.09, 0.12 ± 0.06, 0.13 ± 0.06, 0.22 ± 0.07, and 0.19 ± 0.07fm, respectively. This result suggests a new method for the measurement of the neutron-skin thicknesses of unstable nuclei. © 1999 The American Physical Society.
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Polarization transfer observables for proton inelastic scattering from 12C at 0°
A. Tamii, H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, K. Hatanaka, K. Hosono, F. Ihara, T. Inomata, T. Ishikawa, M. Itoh, M. Kawabata, T. Kawabata, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, H. Takeda, T. Taki, H. Toyokawa, H. P. Yoshida, M. Yoshimura, M. Yosoi
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 459 ( 1-3 ) 61 - 66 1999
Joint Work
Publisher：Elsevier
Polarization transfer (PT) observables in the 12C(p,p′) reaction at 0° for 392 MeV protons have been measured. The excitation strengths are decomposed into the spin-flip part and the non-spin-flip part by using the obtained PT observables. The PT observables for excitation of the 1+, T = 0 and 1+, T = 1 states are compared with distorted wave impulse approximation calculations. The strength ratios of the isoscalar spin-dependent term to the isovector tensor term and the isovector tensor term to the isovector spin-dependent term are reasonably consistent with the Franey and Love interaction. © 1999 Published by Elsevier Science B.V. All rights reserved.
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Mirror-symmetry structure of [Formula Presented] nuclei studied through strong, weak, and electromagnetic interactions Reviewed
Y. Fujita, H. Akimune, I. Daito, H. Fujimura, M. Fujiwara, M. N. Harakeh, T. Inomata, J. Jänecke, K. Katori, A. Tamii, M. Tanaka, H. Ueno, M. Yosoi
Physical Review C - Nuclear Physics 59 ( 1 ) 90 - 100 1999
Joint Work
Gamow-Teller (GT) transitions and [Formula Presented] transitions from or to the ground states are analogous in the pair of [Formula Presented] mirror nuclei, if the excited states hold the mirror-symmetry properties. In order to study the mirror-symmetry structure of the [Formula Presented] mirror nuclei [Formula Presented] and [Formula Presented] experimental data on GT transition strengths obtained from [Formula Presented] decay and from a good-resolution [Formula Presented] reaction at 150 MeV/nucleon and 0° have been compared with [Formula Presented] transition strengths obtained from [Formula Presented] decay in [Formula Presented] and [Formula Presented] reaction. Good overall correspondence of transitions is observed for states up to nearly 9 MeV in excitation energy, where the particle-decay channel becomes important. The difference of excitation energies of analog states in the mirror nuclei are about 250 keV at this excitation energy. From a comparison of [Formula Presented] and [Formula Presented] strengths of the analogous transitions, the contribution of the isoscalar and the orbital terms in the [Formula Presented] operator is found to become prominent in weak [Formula Presented] transitions. © 1999 The American Physical Society.
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Gamow-Teller transitions in the [Formula Presented] reaction at [Formula Presented] Reviewed
S. Nakayama, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, T. Inomata, K. Ishibashi, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamagata
Physical Review C - Nuclear Physics 60 ( 4 ) 4 1999
Joint Work
We investigated the Gamow-Teller (GT) transitions in the [Formula Presented] reaction at [Formula Presented] on light nuclei of [Formula Presented] and [Formula Presented] A one-step reaction process with a main contribution from the central force is dominant in the [Formula Presented] reaction at forward angles. The cross sections observed at [Formula Presented] for the GT transitions were found to be proportional to the GT strengths deduced from the β decay. © 1999 The American Physical Society.
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Elastic Scattering of Polarized Protons from $^{58}$Ni at E(p) = 192, 295, and 400 MeV Reviewed
H. Sakaguchi, H. Takeda, S. Toyama, M. Itoh, A. Yamagoshi, A. Tamii, M. Yosoi, H. Akimune, I. Daito, T. Inomata, T. Noro, Y. Hosono
Phys.Rev. C57 1749 1998.11
Joint Work
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Gamow-Teller Strengths from (t, $^{3}$He) Charge-Exchange Reactions on Light Nuclei Reviewed
I. Daito, H. Akimune, S. M. Austin, D. Bazin, G. P. A. Berg, J. A. Brown, B. S. Davids, Y. Fujita, H. Fujimura, M. Fujiwara, R. Hazama, T. Inomata, K. Ishibashi, J. Janecke, S. Nakayama, K. Pham, D. A. Roberts, B. M. Sherrill, M. Steiner, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Phys.Lett. 418B 27 1998.11
Joint Work
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Low-Lying States of $^{56}$Fe Reviewed
R. De Leo, H. Akimune, N. Blasi, I. Daito, Y. Fujita, M. Fujiwara, S. I. Hayakawa, S. Hatori, H. Ikegami, T. Inomata, I. Katayama, K. Katori, L. Lagamba, S. Micheletti, S. Morinobu, R. Perrino, M. Pignanelli, H. Sakamoto, J. Takamatsu, M. Tosaki
Phys.Rev. C57 1604 1998.11
Joint Work
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Spin-Isospin Responses of $^{71}$Ga for Solar Neutrinos Studied by $^{71}$Ga($^{3}$He, t$\gamma$)$^{71}$Ge Reaction Reviewed
H. Ejiri, H. Akimune, Y. Arimoto, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, M. B. Greenfield, M. N. Harakeh, F. Ihara, T. Inomata, K. Ishibashi, J. Janecke, H. Kohri, S. Nakayama, C. Samanta, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Phys.Lett. 433B 257 1998.11
Joint Work
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Particle Decays from $^{12}$B and $^{12}$N Mirror Nuclei Reviewed
T. Inomata, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, Y. Fujita, M. Fujiwara, M. N. Harakeh, K. Ishibashi, H. Kohri, N. Matsuoka, S. Nakayama, A. Tamii, M. Tanaka, H. Toyokawa, M. Yoshimura, M. Yosoi
Phys.Rev. C57 3153 1998.11
Joint Work
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The ($^{7}$Li, $^{7}$Be) Reaction as a Spin-Probe for Isovector Excitations Reviewed
S. Nakayama, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, T. Inomata, K. Ishibashi, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamagata
Nucl.Instrum.Methods Phys.Res. A402 367 1998.11
Joint Work
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GSO-Detector System ' NYMPHS ' for ($^{7}$Li, $^{7}$Be-$\gamma$) Reaction at Intermediate Energies Reviewed
S. Nakayama, K. Fushimi, H. Kohri, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, T. Inomata, K. Ishibashi, T. Iwawaki, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamagata
Nucl.Instrum.Methods Phys.Res. A404 34 1998.11
Joint Work
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Spin-isospin responses of 71Ga for solar neutrinos studied by 71Ga(3He,tγ) 71Ge reaction
H. Ejiri, H. Akimune, Y. Arimoto, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, M. B. Greenfield, M. N. Harakeh, F. Ihara, T. Inomata, K. Ishibashi, J. Jänecke, H. Kohri, S. Nakayama, C. Samanta, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 433 ( 3-4 ) 257 - 262 1998.8
Joint Work
Publisher：Elsevier
The charge-exchange 71Ga(3He,tγ)71Ge reaction was used to study the spin-isospin (Gamow Teller: GT) excitations relevant to the axial-vector charged-weak response for solar neutrinos. High-lying GT states in 71Ge with excitation energies up to one MeV above the neutron threshold were found to have finite γ-decay branches to low-lying states. The GT strengths for relevant states and absorption rates of solar neutrinos through the 71Ga(e)71Ge and 71Ga(ν,eγ)71Ge reactions were derived. © 1998 Elsevier Science B.V. All rights reserved.
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GSO-detector system "NYMPHS" for (7Li, 7Be-γ) reaction at intermediate energies
S. Nakayama, K. Fushimi, H. Kohri, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, T. Inomata, K. Ishibashi, T. Iwawaki, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamagata
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 404 ( 1 ) 34 - 40 1998.2
Joint Work
A γ-ray detector system "NYMPHS" was built for 7Be-γ coincidence measurements to separate (7Li, 7Beg.s.) and (7Li, 7Be0.43MeV) channels in the (7Li, 7Be) reaction at intermediate energies. NYMPHS is composed of 22 GSO scintillators, each with a volume of about 30 cm3. A typical energy resolution was about 9% at Eγ = 0.66 MeV.The absolute detection efficiency of NYMPHS was 0.200 ± 0.005 for the 0.43 MeV 7Be γ-ray. NYMPHS combined with a magnetic spectrograph showed good performance for 7Be-γ coincidence measurements in the (7Li, 7Be) reactions on 12C and 90Zr targets at EL = 65A MeV. © 1998 Elsevier Science B.V. All rights reserved.
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Gamow-Teller strengths from (t,3He) charge-exchange reactions on light nuclei
I. Daito, H. Akimune, Sam M. Austin, D. Bazin, G. P.A. Berg, J. A. Brown, B. S. Davids, Y. Fujita, H. Fujimura, M. Fujiwara, R. Hazama, T. Inomata, K. Ishibashi, J. Jänecke, S. Nakayama, K. Pham, D. A. Roberts, B. M. Sherrill, M. Steiner, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 418 ( 1-2 ) 27 - 33 1998.1
Joint Work
Publisher：Elsevier
Zero-degree cross sections have been measured for (t,3He) reactions on the light target nuclei 9Be, 10B, 11B, 12C, and 13C at a bombarding energy of 127 MeV/A. The triton beam was produced by (4He,t + p) breakup on a Be production target using a 4He beam of 155 MeV/A. Dispersion matching was applied to obtain good energy resolution (ΔE/E = 0.002, ΔE = 780 keV). The zero-degree (t,3He) cross sections are used to discuss Gamow-Teller strengths in 10Be and 11Be. © 1998 Elsevier Science B.V.
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The (7Li,7Be) reaction as a spin-probe for isovector excitations
S. Nakayama, H. Akimune, I. Daito, H. Fujimura, Y. Fujita, M. Fujiwara, K. Fushimi, T. Inomata, K. Ishibashi, H. Kohri, N. Koori, K. Takahisa, A. Tamii, M. Tanaka, H. Toyokawa, T. Yamagata
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 402 ( 2-3 ) 367 - 370 1998.1
Joint Work
The (7Li,7Be) reaction was found to be used to separate ΔS = 0 and ΔS = 1 transitions through the coincidence measurement of the γ-ray from deexcitation of the 0.43 MeV state of 7Be at an incident energy of 65 A MeV on 6Li, 7Li, 12C and 90Zr nuclei. The reaction was shown to proceed predominantly via one-step reaction process. Predominance of one-step process means utility for derivation of spin-flip and non spin-flip strengths for isovector excitations in medium heavy nuclei at intermediate incident energies. The relative nuclear spin-strength Psf was deduced for isovector excitations.
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Erratum to "(t, He-3) reaction; New tool for studying spin-isospin excitations in neutron rich nuclei" (vol 397, pg 465, 1997) Reviewed
Daito I, Akimune H, Austin SM, Bazin D, Berg GPA, Brown JA, Davids BS, Fujita Y, Fujimura H, Fujimura M, Hazama R, Inomata T, Ishibashi K, Janecke J, Nakayama S, Pham K, Roberts DA, Sherrill BM, Steiner M, Tamii A, Tanaka M, Toyokawa H, Yosoi M
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 402 ( 1 ) 177 1998.1
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Elastic scattering of polarized protons from [Formula Presented] at [Formula Presented], 295, and 400 MeV Reviewed
H. Sakaguchi, H. Takeda, S. Toyama, M. Itoh, A. Yamagoshi, A. Tamii, M. Yosoi, H. Akimune, I. Daito, T. Inomata, T. Noro, Y. Hosono
Physical Review C - Nuclear Physics 57 ( 4 ) 1749 - 1755 1998
Joint Work
Elastic scattering of polarized protons from [Formula Presented] has been measured at incident proton energies of 192, 295, and 400 MeV. Optical model calculations employing relativistic impulse approximations and a microscopic folding model using a nonrelativistic [Formula Presented] matrix are compared with the experimental results. In order to explain the experiment further, it is necessary to use a density distribution deduced from the charge distribution measured by electron scattering and to modify the nucleon-nucleon interaction in the nuclear medium by altering coupling constants between nucleons and mesons and also adjusting the masses of exchanged mesons. © 1998 The American Physical Society.
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Particle decays from [Formula Presented] and [Formula Presented] mirror nuclei Reviewed
T. Inomata, H. Akimune, I. Daito, H. Ejiri, H. Fujimura, Y. Fujita, M. Fujiwara, M. N. Harakeh, K. Ishibashi, H. Kohri, N. Matsuoka, S. Nakayama, A. Tamii, M. Tanaka, H. Toyokawa, M. Yoshimura, M. Yosoi
Physical Review C - Nuclear Physics 57 ( 6 ) 3153 - 3166 1998
Joint Work
Spin-isospin excitations in [Formula Presented] B and [Formula Presented] N have been studied using the [Formula Presented] C[Formula Presented],[Formula Presented] He)[Formula Presented] B and [Formula Presented] C[Formula Presented] He,[Formula Presented][Formula Presented] N charge-exchange reactions at [Formula Presented] = 0[Formula Presented] and at [Formula Presented]=200 MeV and [Formula Presented][Formula Presented] He)=450 MeV, respectively. Neutron decay from [Formula Presented] B to [Formula Presented] B and proton decay from [Formula Presented] N to [Formula Presented] C have been measured with detector arrays consisting of liquid-scintillation counters and silicon detectors, respectively. Microscopic structures of the spin-dipole resonances in [Formula Presented] B and [Formula Presented] N are discussed on the basis of the experimental observations of particle decays and their angular correlations. © 1998 The American Physical Society.
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Low-lying states of [Formula Presented] Reviewed
R. De Leo, H. Akimune, N. Blasi, I. Daito, Y. Fujita, M. Fujiwara, S. I. Hayakawa, S. Hatori, H. Ikegami, T. Inomata, I. Katayama, K. Katori, L. Lagamba, S. Micheletti, S. Morinobu, R. Perrino, M. Pignanelli, H. Sakamoto, J. Takamatsu, M. Tosaki
Physical Review C - Nuclear Physics 57 ( 4 ) 1604 - 1616 1998
Joint Work
Low-lying states at [Formula Presented] of excitation energy in [Formula Presented] have been studied by means of inelastic deuteron scattering at [Formula Presented] The spin, parity, and isoscalar matrix element of detected levels have been deduced by comparing the measured cross sections with coupled-channel calculations using collective form factors. The present data for higher excitation energies have been analyzed by combining with previous data at lower excitation energies. The low-energy octupole strength in [Formula Presented] is found to be mostly located in the excitation energy range of [Formula Presented] The strength is weakly fragmented, and the [Formula Presented] level exhausts the major part of the octupole energy-weighted-sum-rule value. A similar behavior is observed for the quadrupole strength in [Formula Presented] which is mostly located below [Formula Presented] This is in contrast with the behavior of the [Formula Presented] and [Formula Presented] states in [Formula Presented] which are heavily fragmented despite the weaker quadrupole deformation. The hexadecapole strength is strongly fragmented both in [Formula Presented] and in [Formula Presented] The strength distributions for the transitions with multipolarities [Formula Presented] 3, and 4 in [Formula Presented] have been compared with random phase approximation calculations. The theoretical calculations show that the closure of the [Formula Presented] shell is responsible for the observed fragmentation of the [Formula Presented] and [Formula Presented] strengths in [Formula Presented] and that the collectivity of the [Formula Presented] and [Formula Presented] levels of [Formula Presented] is restored by the presence of two neutrons outside the [Formula Presented] shell. © 1998 The American Physical Society.
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Isospin and Spin-Orbital Structures of J($\pi$) = 1$^{+}$ States Excited in $^{28}$Si Reviewed
Y. Fujita, H. Akimune, I. Daito, M. Fujiwara, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, C. Luttge, S. Nakayama, P. von Neumann-Cosel, A. Richter, A. Tamii, M. Tanaka, H. Toyokawa, H. Ueno, M. Yosoi
Phys.Rev. C55 1137 1997.11
Joint Work
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GT Strengths Studied by ($^{3}$He, t) Reactions and Nuclear Matrix Elements for Double Beta Decays Reviewed
H. Akimune, H. Ejiri, M. Fujiwara, I. Daito, T. Inomata, R. Hazama, A. Tamii, H. Toyokawa, M. Yosoi
Phys.Lett. 394B 23 1997.11
Joint Work
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Evidence for the Isoscalar Giant Dipole Resonance in $^{208}$Pb using Inelastic $\alpha$ Scattering at and Near 0$^\circ$ Reviewed
B. F. Davis, U. Garg, W. Reviol, M. N. Harakeh, A. Bacher, G. P. A. Berg, C. C. Foster, E. J. Stephenson, Y. Wang, J. Janecke, K. Pham, D. Roberts, H. Akimune, M. Fujiwara, J. Lisantti
Phys.Rev.Lett. 79 609 1997.11
Joint Work
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(t, $^{3}$He) Reaction; New tool for studying spin-isospin excitations in neutron rich nuclei Reviewed
I. Daito, H. Akimune, S. M. Austin, D. Bazin, G. P. A. Berg, J. A. Brown, B. S. Davids, Y. Fujita, H. Fujimura, M. Fujiwara, R. Hazama, T. Inomata, K. Ishibashi, J. Janecke, S. Nakayama, K. Pham, D. A. Roberts, B. M. Sherrill, M. Steiner, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Nucl.Instrum.Methods Phys.Res. A397 465 1997.11
Joint Work
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(t,3He) reaction; new tool for studying spin-isospin excitations in neutron rich nuclei
I. Daito, H. Akimune, S. M. Austin, D. Bazin, G. P.A. Berg, J. A. Brown, B. S. Davids, Y. Fujita, H. Fujimura, M. Fujiwara, R. Hazama, T. Inomata, K. Ishibashi, J. Jänecke, S. Nakayama, K. Pham, D. A. Roberts, B. M. Sherrill, M. Steiner, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 397 ( 2-3 ) 465 - 471 1997.10
Joint Work
Initial experiments were carried out to study spin-isospin transitions in nuclei using (t,3He) measurements. A triton beam was produced from the breakup reaction (4He,t-p) on a 9.25 g/cm2 Be production target using a 4He beam of 620 MeV. With a beam of 70 enA a yield of 381 MeV tritons with 4.5 × 106 particles/s was achieved. The first half of the A1200 beam transport system at NSCL was used to analyze the triton beam. The energy spread at the target position was estimated to be about 23 MeV. The second half of the A1200 was used to analyze the energy of 3He particles from the (t,3He) reaction. The dispersion matching method was applied to obtain good energy resolution despite the significant energy spread of the incident tritons. The achromatic properties of the A1200 system made it possible to obtain high-resolution (t,3He) spectra at θ = 0° with a resolution of ΔE/E = 0.002 (ΔE = 780 keV).
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GT strengths studied by (3He, t) reactions and nuclear matrix elements for double beta decays
Hidetoshi Akimune, Hiroyasu Ejiri, Mamoru Fujiwara, Izuru Daito, Toru Inomata, Ryota Hazama, Atsushi Tamii, Hidenori Toyokawa, Mosaru Yosoi
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 394 ( 1-2 ) 23 - 28 1997.2
Joint Work
Publisher：Elsevier
GT matrix elements Mv S for transitions of 100Mo(0+) → 100Tc(1+) and 116Cd(0+) → 116In(1+) were obtained by measuring (3He, t) reactions on 100Mo and 116Cd, respectively. The values for Mv S, together with the GT matrix elements Mv S′ for 100Tc(1+) → 100Ru(0+) and 116In(1+) → 116Sn(0+), are applied to estimate the nuclear matrix elements M2v SS′, for the two neutrino double beta decays (2vββ) of 100Mo and 116Cd through the 1+ ground states in the intermediate nuclei of 100Tc and 116In, respectively. They are very close to the observed 2vββ matrix elements M2v, consistent with recent experimental and theoretical analyses.
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Evidence for the isoscalar giant dipole resonance in 208 Pb using inelastic α scattering at and near 0°
B. F. Davis, U. Garg, W. Reviol, M. N. Harakeh, A. Bacher, G. P.A. Berg, C. C. Foster, E. J. Stephenson, Y. Wang, J. Jänecke, K. Pham, D. Roberts, H. Akimune, M. Fujiwara, J. Lisantti
Physical Review Letters 79 ( 4 ) 609 - 612 1997.1
Joint Work
The isoscalar giant dipole resonance (ISGDR) in 208 Pb has been investigated using inelastic scattering of 200 MeV α particles at and near 0° where the angular distribution of the ISGDR can be clearly differentiated from those of other modes. The “difference of spectra” technique was employed to separate the ISGDR from the high-energy octupole resonance (HEOR). These data provide the clearest evidence yet for the ISGDR adjacent to the HEOR. With these results, all expected isoscalar λ ≤ 3 resonances in 208Pb have been identified. © 1997 The American Physical Society.
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Isospin and spin-orbital structures of [Formula Presented] states excited in [Formula Presented]Si Reviewed
Y. Fujita, H. Akimune, I. Daito, M. Fujiwara, M. N. Harakeh, T. Inomata, J. Jänecke, K. Katori, C. Lüttge, S. Nakayama, P. von Neumann-Cosel, A. Richter, A. Tamii, M. Tanaka, H. Toyokawa, H. Ueno, M. Yosoi
Physical Review C - Nuclear Physics 55 ( 3 ) 1137 - 1145 1997
Joint Work
Gamow-Teller (GT) states with [Formula Presented] = 1[Formula Presented] excited by a [Formula Presented]-type charge-exchange reaction on [Formula Presented] nuclei with ground-state isospin [Formula Presented] have isospin [Formula Presented], while [Formula Presented] states excited by inelastic scattering of electrons or protons can have either [Formula Presented] or [Formula Presented]. The latter are the isobaric analog states of the GT states. By comparing the GT states observed in the good-resolution [Formula Presented] reaction at 150 MeV/nucleon with the [Formula Presented] states observed in inelastic electron and proton reactions, the isospin structure of the [Formula Presented] states in [Formula Presented] has been determined. From an analysis of the strengths of corresponding [Formula Presented] states observed in the [Formula Presented] and [Formula Presented] reactions, the spin and orbital contributions to the [Formula Presented] excitations have been deduced. © 1997 The American Physical Society.
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Spin Isospin Resonances in Nuclei Reviewed
M. Fujiwara, H. Akimune, I. Daito, H. Ejiri, Y. Fujita, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Janecke, S. Nakayama, N. Takemura, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Nucl.Phys. A599 223c 1996.11
Joint Work
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The ' Other ' Giant Dipole Resonance: Evidence for the isoscalar giant dipole resonance in $^{208}$Pb from inelastic $\alpha$ scattering at 0$^\circ$ Reviewed
B. F. Davis, H. Akimune, A. Bacher, G. P. A. Berg, C. C. Foster, M. Fujiwara, U. Garg, M. N. Harakeh, J. Janecke, J. Lisantti, K. Pham, W. Reviol, D. Roberts, E. J. Stephenson, Y. Wang
Nucl.Phys. A599 277c 1996.11
Joint Work
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Isospin Character of Low-Lying States in $^{56}$Fe Reviewed
R. De Leo, H. Akimune, N. Blasi, I. Daito, Y. Fujita, M. Fujiwara, S. I. Hayakawa, S. Hatori, K. Hosono, H. Ikegami, T. Inomata, I. Katayama, K. Katori, L. Lagamba, S. Micheletti, S. Morinobu, T. Nakagawa, S. Nakayama, A. Narita, T. Noro, R. Perrino, M. Pignanelli, H. Sakaguchi, J. Takamatsu, A. Tamii, K. Tamura, M. Tanaka, A. Terakawa, T. Tohei, M. Tosaki, T. Yamagata, A. Yamagoshi, M. Yoshimura, M. Yosoi
Phys.Rev. C53 2718 1996.11
Joint Work
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Isospin Decomposition of the Gamow-Teller Strength in $^{58}$Cu Reviewed
Y. Fujita, H. Akimune, I. Daito, M. Fujiwara, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, H. Nakada, S. Nakayama, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Phys.Lett. 365B 29 1996.11
Joint Work
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The "other" giant dipole resonance: Evidence for the isoscalar giant dipole resonance in 208Pb from inelastic α scattering at 0° Reviewed
B. F. Davis, H. Akimune, A. Bacher, G. P.A. Berg, C. C. Foster, M. Fujiwara, U. Garg, M. N. Harakeh, J. Jänecke, J. Lissanti, K. Pham, W. Reviol, D. Roberts, E. J. Stephenson, Y. Wang
Nuclear Physics A 599 ( 1-2 ) 277c 1996.3
Joint Work
Publisher：Elsevier
The isoscalar giant dipole resonance (ISGDR) in 208Pb has been investigated using inelastic scattering of 200 MeV α particles at and near 0° where the angular distribution of the ISGDR can be clearly differentiated from other modes. The "difference of spectra" technique was employed to separate the contribution from the high-energy octupole resonance (HEOR). Preliminary angular distribution data provide clear evidence for the ISGDR adjacent to the HEOR.
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The ''other'' giant dipole resonance: Evidence for the isoscalar giant dipole resonance in Pb-208 from inelastic alpha scattering at 0 degrees Reviewed
BF Davis, H Akimune, A Bacher, GPA Berg, CC Foster, M Fujiwara, U Garg, MN Harakeh, J Janecke, J Lissanti, K Pham, W Reviol, D Roberts, EJ Stephenson, Y Wang
NUCLEAR PHYSICS A 599 ( 1-2 ) C277 - C282 1996.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
The isoscalar giant dipole resonance (ISGDR) in Pb-208 has been investigated using inelastic scattering of 200 MeV alpha particles at and near 0 degrees where the angular distribution of the ISGDR can be clearly differentiated from other modes. The ''difference of spectra'' technique was employed to separate the contribution from the high-energy octupole resonance (HEOR). Preliminary angular distribution data provide clear evidence for the ISGDR adjacent to the HEOR.
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Isospin character of low-lying states in 56Fe
R. De Leo, H. Akimune, N. Blasi, I. Daito, Y. Fujita, M. Fujiwara, S. I. Hayakawa, S. Hatori, K. Hosono, H. Ikegami, T. Inomata, I. Katayama, K. Katori, L. Lagamba, S. Micheletti, S. Morinobu, T. Nakagawa, S. Nakayama, A. Narita, T. Noro, R. Perrino, M. Pignanelli, H. Sakaguchi, J. Takamatsu, A. Tamii, K. Tamura, M. Tanaka, A. Terakawa, T. Tohei, M. Tosaki, T. Yamagata, A. Yamagoshi, M. Yosimura, M. Yosoi
Physical Review C - Nuclear Physics 53 ( 6 ) 2718 - 2731 1996
Joint Work
Publisher：American Physical Society
Low-lying states in 56Fe, up to an excitation energy of about 4 MeV, have been investigated by means of inelastic proton and deuteron scattering experiments at Ep=65 and 400 MeV and at Ed=56 MeV, respectively. Measured cross sections and analyzing powers have been compared with coupled-channels calculations using collective form factors
calculations in both the Schrödinger and Dirac formalisms have been carried out for the proton data. For each probe, the matrix elements have been deduced for transitions from the ground state and from the 2+1 state to six quadrupole (2+) states to one octupole (3-1) and two hexadecapole (4+1 and 4+2) states. The obtained matrix elements and the previous values from y decay or electron inelastic scattering have been used to evaluate the isospin character of the transitions. To discuss the quadrupole mixed-symmetry states in 56Fe, the deduced neutron (Mn) and proton (Mp) components of the matrix elements, or equivalently the isoscalar (Ms) and isovector (Mv) parts, have been compared with theoretical calculations based on the neutron-proton interacting boson model and on the shell model evaluated in a full f-p configuration space. -
Zero-Degree Proton Inelastic Scattering to the 1$^{+}$, T = 0 and T = 1 States in $^{12}$C Reviewed
Y. Sakemi, H. Sakaguchi, M. Yosoi, H. Akimune, T. Takahashi, A. Yamagoshi, A. Tamii, M. Fujiwara, K. Hatanaka, K. Hosono, T. Noro, H. Togawa, I. Daito, Y. Fujita, T. Inomata
Phys.Rev. C51 3162 1995.11
Joint Work
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Direct Proton Decay from the Gamow-Teller Resonance in $^{208}$Bi Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Phys.Rev. C52 604 1995.11
Joint Work
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Fragmentation and Splitting of Gamow-Teller Resonances in Sn($^{3}$He, t)Sb Charge-Exchange Reactions, A = 112-124 Reviewed
K. Pham, J. Janecke, D. A. Roberts, M. N. Harakeh, G. P. A. Berg, S. Chang, J. Liu, E. J. Stephenson, B. F. Davis, H. Akimune, M. Fujiwara
Phys.Rev. C51 526 1995.11
Joint Work
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Direct proton decay from the Gamow-Teller Resonance
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M.B. Greenfield, M.N. Harakeh, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka and M. Yosoi
Physical Review C 52 604 - 615 1995.7
Joint Work
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FRAGMENTATION AND SPLITTING OF GAMOW-TELLER RESONANCES IN SN(HE-3,T)SB CHARGE-EXCHANGE REACTIONS, A=112-124 Reviewed
K PHAM, J JANECKE, DA ROBERTS, MN HARAKEH, GPA BERG, S CHANG, J LIU, EJ STEPHENSON, BF DAVIS, H AKIMUNE, M FUJIWARA
PHYSICAL REVIEW C 51 ( 2 ) 526 - 540 1995.2
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Zero-degree proton inelastic scattering to the 1+, T=0 and T=1 states in C12 Reviewed
Y. Sakemi, H. Sakaguchi, M. Yosoi, H. Akimune, T. Takahashi, A. Yamagoshi, A. Tamii, M. Fujiwara, K. Hatanaka, K. Hosono, T. Noro, H. Togawa, I. Daito, Y. Fujita, T. Inomata
Physical Review C 51 ( 6 ) 3162 - 3168 1995
Joint Work
We have measured the zero-degree cross sections for proton inelastic scattering to the 1+, T=0 (12.7 MeV) and 1+, T=1 (15.1 MeV) states in C12 at 65, 100, 200, 300, and 400 MeV. The ratios of cross sections [dσ/dΩ(1+, T=0)]/[dσ/dΩ(1+,T=1)] at 0°are compared with the calculations in the distorted wave approximation using various effective nucleon-nucleon interactions. The experimental ratios are found to be smaller than the theoretical predictions. It was found that the experimental results were better described by modifying the isovector tensor terms of the effective interactions. © 1995 The American Physical Society.
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Spin Excitation Strength from Proton Inelastic Scattering at Zero Degree Reviewed
Y. Sakemi, H. Sakaguchi, M. Yosoi, H. Akimune, T. Takahashi, A. Yamagoshi, A. Tamii, M. Fujiwara, K. Hatanaka, K. Hosono, T. Noro, H. Togawa, I. Daito, Y. Fujita, T. Inomata
Nucl.Phys. A577 33c 1994.11
Joint Work
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Microscopic Structure of the Gamow-Teller Resonance in $^{208}$Bi Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Phys.Lett. 323B 107 1994.11
Joint Work
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($^{3}$He, t) Charge-Exchange Reactions at E($^{3}$He) = 450 MeV, $\theta$=0$^\circ$ Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Nucl.Phys. A569 245c 1994.11
Joint Work
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Microscopic Structure of the Gamow-Teller Resonance in $^{208}$Bi Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Nucl.Phys. A569 255c 1994.11
Joint Work
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Looking for the Isoscalar Giant Dipole Resonance in $^{208}$Pb using Inelastic $\alpha$ Scattering at and Near 0$^\circ$ Reviewed
B. F. Davis, H. Akimune, A. Bacher, G. P. A. Berg, M. Fujiwara, U. Garg, M. N. Harakeh, J. Janecke, J. Lisantti, K. Pham, W. Reviol, D. Roberts, E. J. Stephenson, Y. Wang
Nucl.Phys. A569 325c 1994.11
Joint Work
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Spin-Isospin Excitations in Nuclei via ($^{3}$He, t) Reactions at 450 MeV Reviewed
M. Fujiwara, H. Akimune, I. Daito, H. Ejiri, Y. Fujita, M. B. Greenfield, M. N. Harakeh, R. Hazama, T. Inomata, J. Janecke, N. Kudomi, K. Kume, S. Nakayama, K. Shinmyo, A. Tamii, M. Tanaka, H. Toyokawa, M. Yosoi
Nucl.Phys. A577 43c 1994.11
Joint Work
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The ($^{3}$He, t(p-bar)) Reaction: A means to study the microscopic structure of spin-isospin modes Reviewed
M. N. Harakeh, H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Nucl.Phys. A577 57c 1994.11
Joint Work
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Microscopic Structure of the Gamow-Teller Resonance in $^{208}$Bi
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Janecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Phys.Lett. 323B 107 1994.11
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ATOMIC CHARGE-EXCHANGE BETWEEN FAST HELIUM-IONS AND TARGETS FROM CARBON TO BISMUTH AT BETA=0.36 Reviewed
K DENNIS, H AKIMUNE, GPA BERG, S CHANG, B DAVIS, M FUJIWARA, MN HARAKEH, J JANECKE, J LIU, K PHAM, DA ROBERTS, EJ STEPHENSON
PHYSICAL REVIEW A 50 ( 5 ) 3992 - 3999 1994.11
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Looking for the isoscalar giant dipole resonance in 208Pd using inelastic a scattering at and near O° Reviewed
B. F. Davis, H. Akimune, A. Bacher, G. P.A. Berg, M. Fujiwara, U. Garg, M. N. Harakeh, J. Jänecke, J. Ussanti, K. Pham, W. Reviol, D. Roberts, E. J. Stephenson, Y. Wang
Nuclear Physics, Section A 569 ( 1-2 ) 325 - 332 1994.3
Joint Work
The isoscalar giant dipole resonance (ISGDR) in 208Pb has been investigated using inelastic scattering of 200 MeV α particles at and near 0° where the angular distribution of the ISGDR can be clearly differentiated from other modes. The "difference of spectra" technique was employed to separate the contribution from the high-energy octupole resonance (HEOR). Results from a preliminary analysis of the data are consistent with the expected positions of the ISGOR and HEOR, as well as their expected angular distributions near 0°. © 1994.
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Microscopic structure of the Gamow-Teller resonance in 208Bi Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Jänecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Nuclear Physics, Section A 569 ( 1-2 ) 255 - 265 1994.3
Joint Work
The 208Pb(3He,t)208Bi reaction has been studied with the RCNP ring cyclotron at E(3He) = 450 MeV using the magnetic spectrometer Grand Raiden at θ = 0°. The Gamow-Teller resonance is strongly excited at this bombarding energy. Its microscopic structure has been investigated by measuring the direct proton decay to the neutron-hole states in 207Pb. The branching ratio for proton emission of a few % is much smaller than that for the decay of the isobaric analog state. The total width of the Gamow-Teller resonance as well as its total and partial escape widths have been determined. Several recent theoretical estimates for the escape width differ from the measured values by factors of ~ 2.5. © 1994.
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(HE-3,T) CHARGE-EXCHANGE REACTIONS AT E(HE-3)=450 MEV, THETA=0-DEGREES Reviewed
H AKIMUNE, DAITO, I, Y FUJITA, M FUJIWARA, MB GREENFIELD, MN HARAKEH, T INOMATA, J JANECKE, K KATORI, S NAKAYAMA, H SAKAI, Y SAKEMI, M TANAKA, M YOSOI
NUCLEAR PHYSICS A 569 ( 1-2 ) C245 - C254 1994.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
Spin-isospin excitations in nuclei have been studied by means of the (He-3,t) reactions at 450 MeV on the targets Be-9, (nat)C, Si-28, Ni-58, Ni-62, Zr-90, Sn-118, Sn-120, 124Sn, and Sm-154. The new spectrometer ''Grand Raiden'' was employed for the (He-3,t) study for the first time. Observed (He-3,t) spectra at 0-degrees show remarkable similarity with those from the (p,n) results at intermediate energies, suggesting a simple direct reaction mechanism for the (He-3,t) reaction at 450 MeV. The Gamow-Teller (GT) resonances and the spin-flip DELTAL = 1 resonances are excited very strongly. A fine structure of the GT resonances in medium-heavy nuclei is observed with an energy resolution of 210 keV. It is demonstrated that the (He-3,t) reaction at 450 MeV is a powerful tool to study the spin-isospin excitations in nuclei.
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LOOKING FOR THE ISOSCALAR GIANT-DIPOLE RESONANCE IN PB-208 USING INELASTIC ALPHA-SCATTERING AT AND NEAR 0-DEGREES Reviewed
BF DAVIS, H AKIMUNE, A BACHER, GPA BERG, M FUJIWARA, U GARG, MN HARAKEH, J JANECKE, J LISSANTI, K PHAM, W REVIOL, D ROBERTS, EJ STEPHENSON, Y WANG
NUCLEAR PHYSICS A 569 ( 1-2 ) C325 - C332 1994.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
The isoscalar giant dipole resonance (ISGDR) in Pb-208 has been investigated using inelastic, scattering of 200 MeV a particles at and near 0-degrees where the angular distribution of the ISGDR can be clearly differentiated from other modes. The ''difference of spectra'' technique was employed to separate the contribution from the high-energy octupole resonance (HEOR). Results from a preliminary analysis of the data are consistent with the expected positions of the ISGDR and HEOR, as well as their expected angular distributions near 0-degrees.
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Looking for the Isoscalar Giant Dipole Resonance in Inelastic $\alpha$ Scattering at and Near 0$^\circ$ Reviewed
B. F. Davis, U. Garg, W. Reviol, A. D. Bacher, G. P. A. Berg, E. J. Stephenson, Y. Wang, J. Janecke, K. Pham, D. Roberts, M. N. Harakeh, H. Akimune, M. Fujiwara
Bull.Am.Phys.Soc. 38 No.2, 1052, N7 9 1993.11
Joint Work