AUGER AND ELECTRON DOUBLE-ION COINCIDENCE SPECTROSCOPY OF SULFUR(2P)-IONIZED CS2 MOLECULES/

An experiment is described investigating the electronic deexcitation a nd dissociation of CS2 molecules following ionization at the sulfur (2 p) shell. The S(L-23)-VV Auger spectrum measured at 0.3 eV resolution has been decomposed into spin-orbit line doublets whereby CS22+ final state energies and Auger transition intensities have been derived. Goo d agreement of the energies with published results on spin-selective d ouble charge transfer enables assignment of the observed levels to cal culated states. Ion pairs from fragmentation following the Auger trans ition have been detected and identified by time-of-flight spectroscopy in coincidence with each other and with an energy-resolved Auger elec tron. Four fragmentation channels have been observed. The dependence o f their relative intensities on the Auger energy reveals the correlati on between the energy of the molecular ion and its dissociative behavi our. (C) 1998 Elsevier Science B.V. All rights reserved.