DISSOCIATIVE PHOTO-IONIZATION OF CARBON-DISULFIDE AND CARBONYL SULFIDE

High resolution photoionization mass spectrometry shows that S+ from CS2 and COS, and CS+ from CS2 appear at the thermochemical dissociation limits with no kinetic or internal energy release to the fragments, accompanied by zero energy electrons. S 2+ is formed from CS2 by a bimolecular reaction of CS2+(B̃) of very high cross section, as well as by unimolecular fragmentation. Five new Rydberg series of COS leading to the B̃ and C̃ states are identified, and empirical observations on resonance peak shapes which differ in different channels are presented. © 1979 American Institute of Physics.