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1997 Fiscal Year Final Research Report Summary

Neutrino, Dark Matter and Nuclear Spin Excitations

Research Project

Project/Area Number 07404012
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionResearch Center for Nuclear Physics (RCNP), Osaka University

Principal Investigator

FUJIWARA Mamoru  Osaka University, RCNP,Associate Professor, 核物理研究センター, 助教授 (00030031)

Co-Investigator(Kenkyū-buntansha) NORO Tetsuo  Osaka University, RCNP,Associate Professor, 核物理研究センター, 助教授 (30164750)
OHSUMI Hideaki  Saga University, Associate Professor, 文化教育学部, 助教授 (70176882)
KISHIMOTO Tadashi  Osaka University, Department of Physics, Professor, 大学院・理学研究科, 教授 (90134808)
FUJITA Yoshitaka  Osaka University, Department of Physics, Associate Professor, 大学院・理学研究科, 助教授 (60093457)
TAKAHISA Keiji  Osaka University, RCNP,Research Associate, 核物理研究センター, 助手 (30263338)
Project Period (FY) 1995 – 1997
KeywordsSun / Neutrino / Gamow-Teller Resonance / Double beta decay / Dark Matter / (^3He, t) Reaction / SPring-8 / Infra-red laser
Research Abstract

In this fiscal year, we studied the following subjects ;
・we studied the nuclear spin-isospin responses via the (^3He, t) reactions at 450 MeV by using the high resolution spectrometer "Grand Raiden". The report for the spin-isospin response studied by the coincidence measurement of gamma decay and the ^<71>Ga (^3He, t) reaction has been submitted. In addition, new measurements of the (^3He, t) reactions on ^<176>Yb and ^<160>Gd were made with a high resolution of about 100 keV.
・A high resolution measurement of the (t, ^3He) reaction has been achieved.
・A new underground "Oto" laboratory started. Preparation of the "Elegant V" and "Elegant VI" are in progress.
・We newly proposed a novel method to use the 8 GeV electron beam to get a high quality gamma ray beam in the energy range of 10-30 MeV,which will be used a good probe to study the M1 excitations of nuclei. Inverse Compton scattering is applied to get the gamma-ray beam.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] M.Fujiwara, 他: "Investigation of Quark Nuclear Physics using Laser-Electron Photons" Jap.Soc.for Synchrotoron Radiation Research. 10. 23-35 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Akimune, M.Fujiwara, 他: "GT Strengths Studied by (^3He,t) Reactions and Nuclear Matrix Elements for Double Beta Decays" Phys.Lett.B. 394. 23-28 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Akimune, M.Fujiwara, 他: "Direct Proton decay from the Gamow-Teller resonance in ^<208>Bi" Phys.Rev.C. 52. 604-615 (1995)

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      「研究成果報告書概要(和文)」より
  • [Publications] Y.Fujita, M.Fujiwara, 他: "Isospin and spin-orbit structure of J^π=1^+ states excited in ^<28>Si" Phys.Rev.C. 55. 1137-1145 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Daito, M.Fujiwara, 他: "(t,^3He) Reaction ; New Tool for Studying Spin-Isospin Excitations in Neutron Rich Nuclei" Nucl.Instr.Meth.A. 397. 465-471 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Inomata, M.Fujiwara, 他: "Particle decays from ^<12>B and ^<12>N mirror nuclei" Phys.Rev.C. (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Fujiwara, T.Kinashi, T.Hotta: "Investigation of Quark Nuclear Physics using Laser-Electron Photons" Jap.Soc.for Synchrotoron Radiation Research. 10. 23-35 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Akimune, H.Ejiri, M.Fujiwara, I.Daito, T.Inomata, R.Hazama, A.Tamii, H.Toyokawa, and M.Yosoi: "GT Strengths Studied by (^3He, t) Reactions and Nuclear Matrix Elements for Double Beta Decays" Phys.Lett.B 394. 23-28 (1997)

    • Description
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  • [Publications] Y.Fyjita, 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, and M.Yosoi: "Isospin and spin-orbit structure of J^<pi>=1^+ states excited in ^<28>Si" Phys.Rev.C 55. 1137-1145 (1997)

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      「研究成果報告書概要(欧文)」より
  • [Publications] 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, W.Reviol, D.Roberts, H.Akimune, M.Fujiwara, J.Lissanti: "Evidence fot the Isoscalar Giant Dipole Resonance in ^<208>Pb Using Inelastic alpha Scattering at 0゚" Phys.Rev.Lett.79. 609-612 (1997)

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  • [Publications] I.Daito, H.Akimune, S.M.Austin, D.Bazin, G.P.A.Berg, J.A.Brown, Y.Fujita, H.Fujimura, M.Fujiwara, R.azama, T.Inomata, K.Ishibashi, J.Janecke, S.Nakayama, K.Pham, D.A.Roberts, B.M.Sherrill, M.Steiner, A.Tamii, M.Tanaka, H.Toyokawa, and M.Yosoi: "(t, ^3He) Reaction ; New Tool for Studying Spin-Isospin Excitations in Neutron Rich Nuclei" Nucl.Instr.Meth.A 397. 465-471 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.Samanta, Y.Sakuragi, M.Ito and M.Fujiwara: "Energy dependence in ^6Li-nucleus interactions at intermediate energies" Jour.Phys.G : Nucl.and Part.23. 1697-1705 (1997)

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      「研究成果報告書概要(欧文)」より
  • [Publications] I.Daito, H.Akimune, S.M.Austin, D.Bazin, G.P.A.Berg, J.A.Brown, Y.Fujita, H.Fujimura, M.Fujiwara, R.azama, T.Inomata, K.Ishibashi, J.Janecke, S.Nakayama, K.Pham, D.A.Roberts, B.M.Sherrill, M.Steiner, A.Tamii, M.Tanaka, H.Toyokawa, and M.Yosoi: "Gamow-Teller strength from (t, ^3He) charge-exchange reactions for neutron halo nuclei" Phys.Lett.B (in print). (1998)

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  • [Publications] 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.Perino, M.Pignanelli, H.Sakamoto, J.Takamatsu, M.Tosaki: "Low-lying states of ^<56>Fe" Phys.Rev.C. in Press. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Inomata, H.Akimune, I.Daito, H.Ejiri, H.Fujimura, M.Fujiwara, M.N.Harakeh, K.Ishibashi, H.Kohri, N.Matsuoka, S.Nakayama, A.Tamii, M.Tanaka, H.Toyokawa, M.Yoshimura, and M.Yosoi: "Particle decays from ^<12>B and ^<12>N mirror nuclei" Phys.Rev.C. (to be submitted.).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Fujiwara, I.Daito, H.Fujimura, H.Akimune, T.Inomata, F.Ihara, K.Ishibashi: "Spin-isospin giant resonances by charge exchange exchange reactions" Acta Physica Polonica B. (to be published.).

    • Description
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  • [Publications] M.Fujiwara, T.Hotta, T.Kinashi, K.Takanashi, T.Nakano, Y.Ohashi, S.Date, H.Okuma, and N.Kumagai: "Physics with polarized photons at SPring-8" Acta Physica Polonica B. (to be published.).

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      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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