title: Single and multiple photoionisation of H2S by 40-250 eV photons.
abstract: Multi-electron coincidence measurements on photoionisation of H(2)S have been carried out at photon energies from 40 to 250 eV. They quantify molecular field effects on the Auger process in detail and are in good agreement with the existing theory. Spectra of core-valence double ionisation of H(2)S are presented and partially analysed. Auger decays from the core-valence states produce triply charged product spectra with unexplained and surprising intensity distributions. Triple ionisation by the double Auger process from 2p hole states shows little effect of the molecular field splitting, but includes a substantial contribution from cascade processes, some involving dissociation in intermediate states. The onset of triple ionisation at the molecular geometry is determined as 61 ± 0.5 eV.
authors.affiliation: Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, UK.
authors.forename: J H D
authors.initials: JH
authors.lastname: Eland
authors.forename: R F
authors.initials: RF
authors.lastname: Fink
authors.forename: P
authors.initials: P
authors.lastname: Linusson
authors.forename: L
authors.initials: L
authors.lastname: Hedin
authors.forename: S
authors.initials: S
authors.lastname: Plogmaker
authors.forename: R
authors.initials: R
authors.lastname: Feifel