Papers - AKIMUNE Hidetoshi
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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
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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Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A = 90 Reviewed
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
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
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
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
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
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
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