Papers - AKIMUNE Hidetoshi
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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