Papers - AKIMUNE Hidetoshi
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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
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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
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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
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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
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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
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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
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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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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
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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
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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
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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
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Cluster fragmentations of deep (1s)-hole states in light nuclei
秋宗 秀俊
Nucl.Phys. A738, 451 2004.11
Single Work