K. Dzierzega et al., BRANCHING RATIO MEASUREMENTS FOR SINGLY IONIZED ARGON, Journal of quantitative spectroscopy & radiative transfer, 51(4), 1994, pp. 567-572
Branching ratios were deter-mined for the emission lines from 22 ArII
levels belonging to the 4d, 5s and 5s' configuration (15, 5 and 2 leve
ls respectively). For several lines the first experimental results wer
e obtained. Intensities of 111 ArII spectral lines were measured. As t
he light source, a cascade wall-stabilized arc was used with a mixture
of helium and argon as the working gas.