Lifetimes and Oscillator Strengths for Ultraviolet Transitions in Neutral Chlorine

TL;DR

This study measures lifetimes and oscillator strengths for ultraviolet transitions in neutral chlorine using beam-foil techniques, compares results with theory and observations, and aims to resolve existing discrepancies.

Contribution

It provides new experimental lifetime and oscillator strength data for specific Cl I transitions, addressing inconsistencies in previous theoretical and observational results.

Findings

Measured lifetimes for specific Cl I levels.

Derived oscillator strengths for ultraviolet transitions.

Compared experimental data with theoretical and observational results.

Abstract

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