Wx. Peng et al., LIFETIME MEASUREMENTS OF SOME TM-I EXCITED-STATES BY MONITORING CASCADE FLUORESCENCE, Journal of physics. B, Atomic molecular and optical physics, 26(13), 1993, pp. 333-335
Stepwise laser excitation and monitoring of cascade fluorescence were
used to measure lifetimes of some Tm I excited states. Seven new lifet
imes are reported.