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Study of unstable nuclear structure with radiation-detected optical pumping in solids and magnetic resonance

利用固体辐射检测光泵浦和磁共振研究不稳定核结构

基本信息

批准号：
01460016
负责人：
MATSUKI S.
金额：
$ 3.26万
依托单位：
Kyoto University (1991)Osaka University (1989-1990)
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 1991
项目状态：
已结题

项目摘要

Three topics have been investigated in this research project : 1) Study of Tm isotopes with optical pumping in solids CaF2 and SrF2. Unstable Tm isotopes were implanted into a single crystal CaF2 and polarized with the optical pumping in solids. The isotopes Tm were mass separated with the mass separator CARP at RCNP, Osaka University.The obtained nuclear polarization was about 2-4 %. In addition to the nuclear polarization, a magnetic resonance was observed by applying a rf magnetic field, thereby determined the magnetic moment of 166Tm. The lattice site and ionic states of implanted Tm isotopes we're also investigated with stable Tm isotopes. 2) Unstable In isotopes were implanted into a GaAs single crystal and polarized with optical pumping in solids. The 114In. were mass separated with the mass separator ISOLDE at CERN, and then off-line polarized. Nuclear polarization was observed only at a narrow wavelength region. around 800 nm, observed polarization being about 2%. Also we observed a fine structure around this wavelength region, which may be related to the Landau splitting. 3)The neutron rich 33Si isotopes were implanted into a GaAs single crystal after mass separated with the mass separator RIPS at RIKEN. The nuclear polarization observed was about 2%.By applying a rf magnetic field, Preliminary results on magnetic moment was obtained. These experimental results thus obtained show profound potentiality of the optical pumping in solids for the study of unstable nuclear structure far from the stability line.

本课题主要研究了三个方面的内容：1）固体CaF_2和SrF_2中Tm同位素的光泵浦研究。将不稳定的Tm同位素注入到CaF2单晶中，并利用固体中的光泵浦进行偏振。同位素Tm用大坂大学RCNP的CARP质量分离器进行质量分离，得到的核极化率约为2 - 4%。除了核极化之外，通过施加rf磁场观察磁共振，从而确定166Tm的磁矩。我们还用稳定的Tm同位素研究了注入Tm同位素的晶格位置和离子态。2)将不稳定In同位素注入GaAs单晶中，并在固体中用光泵极化。第114话用CERN的质量分离器ISOLDE进行质量分离，然后离线极化。仅在窄波长区域观察到核极化。在800 nm左右，观察到的偏振为约2%。我们还观察到在这个波长范围内的精细结构，这可能与朗道分裂有关。3)利用RIKEN的质量分离器RIPS对GaAs单晶进行质量分离后，将富中子33Si同位素注入GaAs单晶中。在外加射频磁场下，得到了磁矩的初步结果。这些实验结果显示了固体中光抽运在研究远离稳定线的不稳定核结构方面的巨大潜力。