| 惰性气体超极化的光抽运方法及比较 |
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| 引用本文： | 姚志萍,杨昆,任秋实.惰性气体超极化的光抽运方法及比较[J].激光与光电子学进展,2006,43(8):62-66. |
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| 作者姓名： | 姚志萍 杨昆 任秋实 |
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| 作者单位： | 上海交通大学激光与光子生物医学研究所,上海,200240 |
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| 摘 要： | 某些无放射性的具有自旋特性的惰性气体同位素（如^3He和^129Xe），可通过激光抽运超极化，得到很高的非热平衡极化度和长驰豫时间的惰性气体。极化后惰性气体同位素核磁共振的灵敏度提高10^3～10^5倍。介绍了目前极化惰性气体常用的两种方法——自旋交换光抽运和亚稳态能级交换。
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| 关 键 词： | 原子核物理学 极化气体 自旋交换 亚稳态交换 |
| 收稿时间： | 2006-02-27 |
| 修稿时间： | 2006-02-272006-05-16 |
Optical Pumping Methods and the Comparison in Hyperpolarization of Noble Gas |
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| YAO Zhiping,YANG Kun,REN Qiushi.Optical Pumping Methods and the Comparison in Hyperpolarization of Noble Gas[J].Laser & Optoelectronics Progress,2006,43(8):62-66. |
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| Authors: | YAO Zhiping YANG Kun REN Qiushi |
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| Affiliation: | Institute for Laser Medicine and Bio-photonics, Shanghai Jiaotong University, Shanghai 200240 |
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| Abstract: | Non-radioactive noble gases with a nuclear spin (3He, 129Xe) can be hyperpolarized by optical pumping to produce noble gases with large nonequilibrium nuclear polarization and long relaxation time. The spin polarization of laser - polarized 129Xe and 3He is in the range of 104～105 times the Boltzmann polarization of the 129Xe and 3He in the same magnetic field. Two methods of polarization now: spin exchange and metastability exchange are reviewed. |
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| Keywords: | nucleonics polarized noble gas spin-exchange metastability exchange |
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