Photoionization dynamics in CS fragmented from CS 2 studied by high-resolution photoelectron spectroscopy

The photoionization dynamics of CS have been studied using high-resolution laser photoelectron spectroscopy. The photodissociation of CS 2 at ~308 nm results in highly rotationally excited CS in its X 1 Σ + singlet ground state, as well as in rotationally cold CS in the excited a 3 Π triplet state. The ground-state CS fragments are formed together with sulfur in its 3 P, 1 D, and 1 S electronic states; triplet CS is produced in coincidence with ground-state sulfur ( 3 P). In both channels the photoelectron spectra are dominated by Δv = 0 propensity, but transitions involving Δv = 1 and 2 are also observed. Key words: photoelectron spectroscopy, photoionization, photodissociation, excited states, reactive intermediates.