Mass spectrometric study of the photoionization of CS. The dissociation energy of the CS molecule

A mass spectrometric study of the photoionization of CS provides 11.319 ± 0.006 eV for the ionization potential, in agreement with literature values. Three Rydberg series converging to the C2Σ+ state of the molecular ion are identified. Their limit is 18.003 ± 0.006 eV. The threshold for dissociative ionization of CS towards S+ is located at 70.05 ± 0.1 nm and yields D0(CS, 0 K) = 709.4 ± 2.5 kJ/mol. This result is briefly compared with prior data. D0(CS, 0 K) = 709.6 ± 1.2 kJ/mol and DCS+ 0 K) = 617.1 ± 1.3 kJ/mol are selected as the best estimates for these quantities.