We report the simultaneous measurements of radiative lifetimes, branching fractions, and absolute transition probabilities in atomic samarium using laser-induced fluorescence. The radiative lifetimes of seven odd-parity energy levels and six step-wise-excited even parity energy levels of atomic samarium have been measured. The lifetime values of odd-parity energy levels agree well with those reported in the literature, and the values of even-parity energy levels are new. Excited-level-to-ground-level branching fractions and absolute transition probabilities for twenty-one transitions in atomic samarium are measured using single-color laser-induced fluorescence, and the results are compared against the values reported in the literature. We also report branching fractions and absolute transition probabilities for fifty-one excited-level-to-excited-level transitions in atomic samarium using two-color laser-induced fluorescence. The existing ambiguity in assigning the total angular momentum values for the six stepwise-excited even-parity energy levels is removed by assigning each of these excited levels a unique J value by identifying known odd-parity lower levels to which a stepwise-excited even-parity level decays via fluorescence decay channels.
© 2010 Optical Society of America
Original Manuscript: October 28, 2009
Revised Manuscript: December 21, 2009
Manuscript Accepted: December 21, 2009
Published: February 4, 2010
M. L. Shah, A. K. Pulhani, G. P. Gupta, and B. M. Suri, "Measurements of radiative lifetimes, branching fractions, and absolute transition probabilities in atomic samarium using laser-induced fluorescence," J. Opt. Soc. Am. B 27, 423-431 (2010)