Lifetimes and Oscillator Strengths for Ultraviolet Transitions in Neutral Chlorine

Abstract

We present lifetime measurements using beam-foil techniques for radiative transitions from the 3$p^4$(${}^{1}S$)4$s$ ${}^2{S}_{1/2}$, 3$p^4$(${}^{3}P$)5$s$ ${}^2{P}_{1/2,3/2}$, and 3$p^4$(${}^{3}P$)3$d$ ${}^2{F}_{5/2}$ levels in Cl I and the corresponding results of the oscillator strengths for transitions at 1004.68, 1079.88, 1090.73, and 1094.77 Ã , respectively. We compare our experimental results with available theoretical calculations and astronomical observations in an effort to resolve discrepancies among them.

8 pages, 4 figures