Neutrino, Dark Matter and Nuclear Spin Excitations

中微子、暗物质和核自旋激发

• 批准号: 07404012
• 负责人: FUJIWARA Mamoru
• 金额: $ 25.15万
• 依托单位: Research Center for Nuclear Physics (RCNP), Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07404012/
• 关键词: Sun; Neutrino; Gamow-Teller Resonance; Double beta decay; Dark Matter; (^3He, t) Reaction; SPring-8; Infra-red laser; スピン・アイソスピン共鳴; 宇宙暗黒物質; 電子核; 陽子崩壊; 二重ベータ崩壊; スペクトロメーター; シリコン検出器; スピン・ダイポール共鳴; シリコン・ボール検出器

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.

在本财政年度，我们研究了以下课题：·我们使用高分辨率光谱仪“Grand Raiden”研究了450 MeV下通过（^3He，t）反应的核自旋-同位旋响应。本文报道了用γ衰变和^ Ga（^3He，t）反应的符合测量研究自旋-同位旋响应的结果<71>。此外，还对^ Yb和^ Gd上的（^3He，t）反应进行了新的测量<176><160>，分辨率约为100 keV。实现了对（t，^3He）反应的高分辨率测量。·一个新的地下“Oto”实验室开始运作。“优雅V”和“优雅VI”的准备工作正在进行中。·提出了一种利用8 GeV电子束获得10-30 MeV高质量γ射线束的新方法，它将成为研究原子核M1激发的良好探针。利用逆康普顿散射得到γ射线束。

项目成果

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)

M.Fujiwara、T.Kinashi、T.Hotta：“利用激光电子光子研究夸克核物理”Jap.Soc.for Synchrotoron Radiation Research。

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

M.Fujiwara 等人：“利用激光电子光子研究夸克核物理”Jap.Soc.for Synchrotoron Radiation Research 10. 23-35 (1997)。

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

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、

H.Akimune,M.Fujiwara 他: "Direct proton decay from the Gamow-Teller resonance in ^<208>Bi" Phys. Rev. C. 52. 604-615 (1995)

H. Akimune、M. Fujiwara 等人：“^<208>Bi 中 Gamow-Teller 共振的直接质子衰变”Phys Rev. C. 52. 604-615 (1995)

A.Tamii,M.Fujiwara,et al.,: "New Data Aquisition System for the Focal Plane Polarimeter of the ″Grand Raiden″ Spectrometer" IEEE transactions on Nuclear Science. 43. 2488-2491 (1996)

A. Tamii、M. Fujiwara 等人：“Grand Raiden”光谱仪焦平面旋光仪的新数据采集系统”IEEE 核科学交易，43. 2488-2491 (1996)。