波谱学杂志 ›› 2000, Vol. 17 ›› Issue (3): 191-195.

• 研究论文 • 上一篇    下一篇

激光极化129Xe核自旋弛豫率的测量

王春华1, 孙献平2   

  1. 1华中师范大学物理系, 武汉 430079;
    2 中国科学院武汉物理与数学研究所 波谱与原子分子物理国家重点实验室, 武汉 430071
  • 收稿日期:2000-03-14 修回日期:2000-04-06 出版日期:2000-06-05 发布日期:2018-01-11
  • 作者简介:王春华,男,1980年出生,华中师范大学物理系学生
  • 基金资助:
    波谱与原子分子物理国家重点实验室基金(T981513)和中国科学院武汉物理与数学研究所所长基金(T029906)资助项目

MEASUREMENT OF THE NUCLEAR SPIN RELAXATION RATE OF THE LASER-POLARIZED 129Xe GAS

WANG Chunhua1, SUN Xianping2   

  1. 1 Department of Physics, Central China Normal University, Wuhan 430079;
    2 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
  • Received:2000-03-14 Revised:2000-04-06 Online:2000-06-05 Published:2018-01-11

摘要: 由弱磁场下光泵自旋交换、强磁场中核磁共振测量方法,获得激光极化低压同位素129Xe气体的核自旋弛豫率1/T1及其与N2气压力、环境温度的关系.结果表明:在291K的室温下,对于0~11 333.05Pa的N2气压力范围,1/T1随着N2气压力的增加而增大;N2气压力为1 466.63Pa时,1/T1随着样品温度从234K到292K增高而减小

关键词: 激光极化129Xe, 核磁共振测量, 光泵, 弛豫

Abstract: The nuclear spin relaxation rate 1/T1 of the laser-polarized 129Xe produced in a low magnetic field was measured in a high magnetic field. The relations between the 1/T1 and the pressure of N2 or the temperature were obtained. The results show that the 1/T1 increases as the pressure of N2 varies from 0 to 11333.05Pa when the temperature was kept in 291K, and that the 1/T1 decreases as the temperature varies from 234K to 292K when the pressure of N2 was 1466.63Pa.

Key words: Laser-polarized 129Xe, NMR measurement, Optically pumping, Relaxation