Spin Excitations in Nuclei

原子核中的自旋激发

• 批准号: 10044082
• 负责人: FUJIWARA Mamoru
• 金额: $ 2.94万
• 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 (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10044082/
• 关键词: Sun; Neutrino; Gamow-Teller Resonance; Spin Dipole Resonance; Giant Resonances; γ-ravs; (ィイD13ィエD1He, t) reactions; Proton decav; ガンマ*; (t,^3He)反応

We studied the spin-isospin excitations of nuclei via the (ィイD13ィエD1He,t) reactions at 450 MeV. The subjects studied are listed below;1. ィイD1176ィエD1Yb and ィイD1160ィエD1Gd are considered to be used as a detector material of solar neutrinos in the real-time operation. For this purpose, we measured (ィイD13ィエD1He,t) reactions at 450 MeV and at 177 MeV, at RCNP and at KVI. We confirmed that our previous results are 1002. A measurement of the ィイD1176ィエD1Yb (ィイD13ィエD1He, t) reaction at 177 MeV was made at KVI, AGOR facility. We confirm that the state at 3.07 MeV in ィイD1176ィエD1Lu is 1ィイD1+ィエD1.3. A search for the isovector monopole resonance in Bi was made and the result are submitted to Phys. Rev. Lett. and the paper was accepted for publication.4. The partial decay widths of proton decays from the spin-dipole resonance in ィイD1208ィエD1Bi have been obtained.5. We join the proposal for the construction of a new solar neutrino detector called LENS (Low-Energy-Neutrino-Spectrometer). The LENS project has been accepted at the LNGS in Italy.Sophisticated theoretical calculations in understanding the proton-, neutron- and gamma-decays from the spin excitations in nuclei have been continued.

在450mev下，通过（γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ）反应研究了原子核的自旋-同位旋激发。研究对象如下：1。在实时运行中，可以考虑用γ γ γ γ γ γ和γ γ γ γ γ作为太阳中微子的探测材料。为此，我们测量了450 MeV和177 MeV、RCNP和KVI下的反应（γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ）。我们确认之前的结果是1002。在KVI， AGOR装置上对177 MeV下的反应进行了测量。我们确认在3.07 MeV的状态为1 μ u + 1.3 μ u。对Bi中的等矢量单极子共振进行了搜索，并将结果提交给了物理学杂志。启。论文被录用发表。得到了自旋偶极子共振中质子衰变的部分衰减宽度。我们加入了建造一个新的太阳中微子探测器透镜（低能量中微子光谱仪）的提议。LENS项目已被意大利lng项目所接受。复杂的理论计算在理解质子，中子和γ衰变从原子核的自旋激发一直在继续。

项目成果

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 ィイD112ィエD1B and ィイD112ィエD1N mirror n

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 和 M. Yosoi：“粒子从 D112D1B 和 D11N 镜子衰变 n

T.Inomata,M.Fujiwara,他: "Particle decays from ^<12>B and ^<12>N mirror nuclei" Phys.Rev.C. 57. 3153-3166 (1998)

T. Inomata、M. Fujiwara 等：“粒子从 ^ 12 B 和 ^ 12 N 镜像核衰变” Phys.Rev.C. 57. 3153-3166 (1998)

I.Daito,M.fujiwara,他: "Gamow-Teller strength from (t,^3He) charge-exchange reactions for neutron halo nuclei" Phys.Lett.B. 418. 27-33 (1998)

I.Daito、M.fujiwara 等人：“中子晕核的 (t,^3He) 电荷交换反应的 Gamow-Teller 强度” Phys.Lett.B. 418. 27-33 (1998)

S.Nakayama,M.Fujiwara, 他: "Isovector Electric Monopole Resonance in ^<60>Ni"Phys.Rev.Lett.. 83. 690-693 (1999)

S.Nakayama、M.Fujiwara 等人：“^<60>Ni 中的等矢量电单极子共振”Phys.Rev.Lett.. 83. 690-693 (1999)

V.Nelyubin,M.Fujiwara, 他: "Compton back scattering of X-phones from 8 GeV electrons at SPring-8"Nucl.Instrum.Method Phys.Res.Sec A. 245. 65-74 (1999)

V.Nelyubin、M.Fujiwara 等人：“来自 SPring-8 处 8 GeV 电子的 X 音素的康普顿背散射”Nucl.Instrum.Method Phys.Res.Sec A. 245. 65-74 (1999)