title: A comprehensive study of the vibrationally resolved S 2p(-1) Auger electron spectrum of carbonyl sulfide.
abstract: High-resolution normal Auger-electron spectra of carbonyl sulfide subsequent to S 2p(-1) photoionization at photon energies of 200, 220, and 240 eV are reported along with corresponding photoelectron spectra. In addition, theoretical results are presented that take the core-hole orientation of the various spin-orbit-split and molecular-field-split S 2p(-1) states into account. Auger transitions to eight metastable dicationic final states are observed and assigned on the basis of the theoretical results. From Franck-Condon analysis, assuming Morse potentials along the normal coordinates for seven of the observed quasi-stable dicationic final states, information on the potential-energy surfaces is derived and compared with theoretical results from the literature.
authors.affiliation: Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany.
authors.forename: V
authors.initials: V
authors.lastname: Sekushin
authors.forename: R
authors.initials: R
authors.lastname: Püttner
authors.forename: R F
authors.initials: RF
authors.lastname: Fink
authors.forename: M
authors.initials: M
authors.lastname: Martins
authors.forename: Y H
authors.initials: YH
authors.lastname: Jiang
authors.forename: H
authors.initials: H
authors.lastname: Aksela
authors.forename: S
authors.initials: S
authors.lastname: Aksela
authors.forename: G
authors.initials: G
authors.lastname: Kaindl
mesh_terms: D011789:Quantum Theory; D013057:Spectrum Analysis; D013461:Sulfur Oxides / Q000737:chemistry*; D014732:Vibration
chemical_list: D013461:Sulfur Oxides; C010063:carbonyl sulfide