Measurement of the Magnetic Moment of Neutron Halo Nucleus ^<11>Be

中子晕核^<11>Be磁矩的测量

• 批准号: 09640356
• 负责人: SHIMODA Tadashi
• 金额: $ 1.73万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640356/
• 关键词: Unstable Nuclei; Neutron Halo Nucleus; Magnetic Moments; Spin Polarization; Polarized Electron Transfer; Laser Optical Pumping; Ti : Sapphire Laser; Beam-Foil Spectroscopy; アルカリ原子; 偏極電子; 超微細構造相互作用

Unstable nuclei far from the stability region have been attracting much attention because of their exotic structure. We propose a versatile method to polarize nuclear spin of a wide variety of unstable nuclei. The spin polarizer based on our idea, together with the atom/ion trap in superfluid helium which we have successfully developed, will enable us to systematically investigate the magnetic moments of unstable nuclei.In our method spin polarization will be produced in three steps :(i) The spin polarization of the outermost electron of Rb atom is produced by laser optical pumping.(ii) Then the ions of unstable nuclei pick up the electron to their ionic states.(ii) Finally the hyperfine interaction between the electron and the nucleus produces nuclear spin polarization.In order to study the feasibility and the optimum conditions of the polarizer, we have started construction of a test bench. The test bench has been almost completed. So far we have succeeded in achieving polarization of Rb atom more than 90 %. The performance test of the analyzer system for nuclear spin polarization has been very successful. The nuclear polarization will be demonstrated soon.

远离稳定区的不稳定核因其奇特的结构而备受关注。我们提出了一种通用方法来极化各种不稳定核的核自旋。基于我们的想法的自旋偏振器，加上我们成功开发的超流氦中的原子/离子陷阱，将使我们能够系统地研究不稳定核的磁矩。在我们的方法中，自旋偏振将分三个步骤产生:( i) 通过激光光泵浦产生 Rb 原子最外层电子的自旋极化。(ii) 然后不稳定原子核的离子将电子拾取到离子态。(ii) 最后电子与原子核之间的超精细相互作用产生核自旋偏振。为了研究偏振器的可行性和最佳条件，我们已经开始建设测试台。测试台已基本完成。到目前为止我们已经成功实现了Rb原子极化率超过90%。核自旋极化分析仪系统的性能测试非常成功。核极化很快就会被证明。

项目成果

S.Tanimoto: "Production of Spin-Polarized Radioactive Nuclear Beams by Laser Optical Pumping" JHF-97-5. 75-82 (1997)

S.Tanimoto：“通过激光光泵浦产生自旋偏振放射性核束”JHF-97-5。

中沢,孝彦: "Rd の光ポンピング法におけるレート方程式" JHF-97-5(KEK Proceedings). 11. 83-86 (1997)

Nakazawa, Takahiko：“Rd 光泵浦方法中的速率方程”JHF-97-5（KEK Proceedings）。

中沢孝彦: "Rb の光ポンピング法におけるレート方程式" 高エネルギー加速器研究機構ワークショップ報告書. JHF-97-5. 83-86 (1997)

Takahiko Nakazawa：“Rb 光泵浦速率方程”高能加速器研究组织研讨会报告。JHF-97-5 (1997)。