激光与光电子学进展, 2006, 43 (8): 62, 网络出版: 2006-08-31
惰性气体超极化的光抽运方法及比较
Optical Pumping Methods and the Comparison in Hyperpolarization of Noble Gas
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103～105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。
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.
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. 姚志萍, 杨昆, 任秋实. Optical Pumping Methods and the Comparison in Hyperpolarization of Noble Gas[J]. Laser & Optoelectronics Progress, 2006, 43(8): 62.
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