M. Song et al., RADIATIVE LIFETIME MEASUREMENTS ON PR ATOMS BY OBSERVING TIME-RESOLVED LASER-INDUCED FLUORESCENCE, EUROPEAN PHYSICAL JOURNAL D, 2(2), 1998, pp. 115-116
Fourteen new lifetimes of Pr I low-lying states have been measured by
using thermal atomic beam with single-step pulsed laser excitation and
observing the decay of the fluorescence from the excited Pr atoms.