亚稳能级跃迁 metastable level

基态激发能级跃迁 ground-excited level jump

能级跃迁 [物化] energy level transition

转动能级跃迁 Frequencies of rotational transition

能级跃迁几率 energy level transition probability

二级相跃迁 second order phase transition

多级辐射跃迁 multistage radiative transition

级联跃迁探测器 cascade transtions detector

级联跃迁 [核] cascade transition ; transition stop-over