Analysis of resonance structure in the photoionization of atomic chlorine

We report a revised interpretation of the photoionization cross section of C1 I between the lowest ionization threshold $^{3}P$ and the $^{1}D$ threshold. The two series of narrow resonances which have been observed in the recent measurement by Ru\ifmmode \check{s}\else \v{s}\fi{}\ifmmode \check{c}\else \v{c}\fi{}i\ifmmode \acute{c}\else \'{c}\fi{} and Berkowitz are interpreted as the $(^{1}D)\mathrm{ns}^{2}D$ and $(^{1}D)\mathrm{nd}^{2}S$ series, where the latter is allowed (and narrow) due to a (small) admixture of $(^{1}D)\mathrm{nd}^{2}P$ into the $^{2}S$ wave function. The broad resonances are identified as a superposition of $(^{1}D)\mathrm{nd}^{2}P$ and $(^{1}D)\mathrm{nd}^{2}D$.