Non-radioactive noble gases with a nuclear spin ( ~ 3He, ~ ( 129 ) Xe ) can be hyperpolarized by optical pumping to produce noble gases with large nonequilibrium nuclear polarization and long relaxation time. 某些无放射性的具有自旋特性的惰性气体同位素(如~3He和~(129)Xe),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。