Nuclear Spin Polarization of Short-Lived Nuclei and Magnetic Moment of f_<1/2> Mirror Nuclei

短寿命原子核的核自旋极化和f_<1/2>镜像原子核的磁矩

• 批准号: 01460018
• 负责人: NOJIRI Y.
• 金额: $ 4.29万
• 依托单位: Department of Physics, Faculty of Science, Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01460018/
• 关键词: Short-Lived Nuclei; Spin Polarization; Mirror Nuclei; Magnetic Moment; Tilted Foil Technique; NMR Method

1 A set of experimental system applicable to beta-NMR measurements has been designed and constructed. By use of the system, the fundamental study for the beta-NMR technique was extensively performed by bombarding incident beams onto targets to produce short-lived beta-radioactive nuclei, implanting them into stopping crystals, and detecting beta-rays emitted from the nuclei.2 In order to expand its applicability to a wide variety of short-lived radioactive nuclei, the tilted foil technique has been applied and developed for productions of nuclear polarization in those nuclei. In particular, the fundamental mechanism of the technique has been extensively studied to increase its effectiveness in the polarization creation. The technique was further applied to medium heavy nuclei.3 For post-accelerations of beta-radioactive nuclei produced in nuclear reactions, a small RFQ-linac named "LITL" was prepared and tested. A high-power rf-oscillator connected with LITL was tuned and tested to optimize its acceleration conditions of ions.4 For the post-accelerations of those short-lived nuclei of interest, a HiECR ion-source was developed and tested.5 A small electric magnet was designed and constructed to analyze rigidities of the accelerated ions by combining a power supplier. The magnet was tested by separating ^6Li and ^7Liions extracted from an existing Liion source.6 It is planned for the future research of this project that a new field in nuclear physics, as well as an interdisciplinary field between nuclear physics and particle physics, will be explored by investigating a variety of polarized beta-radioactive nuclei prepared by use of the experimental systempresently developed.

1设计并搭建了一套适用于β-NMR测量的实验系统。通过使用该系统，对β-NMR技术进行了广泛的基础研究，方法是将入射光束轰击到目标上以产生短寿命的β-放射性核，将其注入停止晶体，并检测从核发射的β-射线。倾斜箔技术已经被应用和发展用于在这些核中产生核极化。特别是，该技术的基本机制已被广泛研究，以提高其在偏振创建的有效性。该技术进一步应用于中重核。3为了对核反应中产生的β放射性核进行后加速，制备并测试了一台名为“LITL”的小型RFQ直线加速器。对与LITL连接的高功率射频振荡器进行了调谐和测试，以优化其离子加速条件。4针对感兴趣的短寿命核的后加速，开发并测试了HiECR离子源。5设计并构建了一个小型电磁铁，通过结合电源来分析加速离子的刚度。通过分离从现有锂离子源中提取的^6锂离子和^7锂离子，对磁铁进行了测试。该项目的未来研究计划是，通过研究使用目前开发的实验系统制备的各种极化β放射性核，探索核物理学的一个新领域，以及核物理学和粒子物理学之间的跨学科领域。

项目成果

A.Kitagawa: "Hyperfine Interaction of BetaーEmitting ^<12>B and ^<12>N in Mg Crystal" Hyperfine Interactions. 60. 869-872 (1990)

A.Kitakawa：“镁晶体中β发射^ 12 B和^ 12 N的超精细相互作用”超精细相互作用60。869-872（1990）。

T. Minamisono: "Quadrupole Moment of LS Doubly Closed Shell + 1 Nucleon Nucleus ^<41>Sc(1^P=7/2)." Proc. Ist. Int. Conf. on Radioactive Nuclear Beams, Berkeley, World Scientific. 516-523 (1989)

T. Minamisono：“LS 双闭壳 1 核子核的四极矩 ^<41>Sc(1^P=7/2)。”

T.Minamisono: "Magnetic Moment of BetaーEmitting ^<41>Sc(I^π=7/2^-) and Knight Shift in Pt Metal." Hyperfine Interactions. 59. 149-152 (1990)

T.Minamisono：“Pt 金属中 Beta 发射 ^<41>Sc(I^π=7/2^-) 的磁矩和奈特位移。”59. 149-152 (1990)

Y.Nojiri: "BetaーPolarization Measurements in Solids" Hypefine Interactions. 60. 599-614 (1990)

Y.Nojiri：“固体中的 Beta 偏振测量”Hypefine Interactions。60. 599-614 (1990)

Y.Nojiri: "Nuclear Spin Polarization of BetaーRadioactive Nuclei Created by Means of Tilted Foil Technique" Proc.7th.Int.Conf.on Polarization Phenomena in Nuclear Physics,Paris,Colloque de Physics. C6 Suppl.22.

Y.Nojiri：“通过倾斜箔技术产生的 β 放射性核的核自旋极化”Proc.7th.Int.Conf.on 核物理极化现象，巴黎，Colloque de 物理学增刊 22。