Measurement of radiative lifetimes in Sm II

Abstract

We have measured the radiative lifetimes of 82 levels of Sm II using the beam-laser method. The levels studied had term energies up to ~29 600 cm–1 and lifetimes in the range 9–190 ns. Experimental uncertainty was less than 7%, with a typical value of 1.6%. We have used these lifetimes to update transition probabilities for 35 transitions in the wavelength range 363–771 nm, which are useful for stellar abundance determinations. PACS Nos.: 32.70Cs, 95.30Ky