State-selected electron capture by molecular ions: collisions of CS22+and CS23+with monatomic and diatomic targets

High resolution translation energy change spectra of product ions of electron capture collisions of CS 2 2+ and CS 2 3+ with rare-gas atoms and diatomic molecules, H 2 , N 2 and O 2 , have been measured using a modified, reversed geometry, double focusing mass spectrometer. Electron capture occurs selectively into the ground electronic state except in the case of CS 2 3+ collisions with Xe and O 2 . In the former case significant target excitation occurs whereas in the latter case the predominant reaction result is dissociative electron capture.