title: Complete dissociation branching fractions and Coulomb explosion dynamics of SO2 induced by excitation of O 1s pre-edge resonances.
abstract: Fragmentation processes of SO2 following excitation of the six main O 1s pre-edge resonances, as well as above the ionization threshold and below the resonances, are studied using a position-sensitive time-of-flight ion imaging detector, and the associated dissociation branching ratios and break-up dynamics are determined. In order to distinguish between the O(+) and S(2+) fragments of equal mass-to-charge ratio, the measurements have been performed with the isotopically enriched S(18)O2 sample. By analysis of the complete set of the fragment momentum vectors, the β values for the fragments originating from the SO(+) + O(+) break-up and the kinetic energy release for fragmentation channels of both SO2 (2+) and SO2 (3+) parent ions are determined. We also present results on the three-body break-up dynamics.
authors.affiliation: Department of Physics, Stockholm University, 106 91 Stockholm, Sweden.
authors.forename: Peter
authors.initials: P
authors.lastname: Salén
authors.affiliation: Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden.
authors.forename: Vasyl
authors.initials: V
authors.lastname: Yatsyna
authors.affiliation: IOM-CNR Tasc, SS-14, Km 163.5 Area Science Park, Basovizza, I-34149 Trieste, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Schio
authors.affiliation: Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden.
authors.forename: Raimund
authors.initials: R
authors.lastname: Feifel
authors.affiliation: Department of Physics, Stockholm University, 106 91 Stockholm, Sweden.
authors.forename: Magnus
authors.initials: M
authors.lastname: Af Ugglas
authors.affiliation: Elettra-Sincrotrone Trieste, Area Science Park, 34149 Basovizza, Trieste, Italy.
authors.forename: Robert
authors.initials: R
authors.lastname: Richter
authors.affiliation: IOM-CNR Tasc, SS-14, Km 163.5 Area Science Park, Basovizza, I-34149 Trieste, Italy.
authors.forename: Michele
authors.initials: M
authors.lastname: Alagia
authors.affiliation: IOM-CNR Tasc, SS-14, Km 163.5 Area Science Park, Basovizza, I-34149 Trieste, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Stranges
authors.affiliation: Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden.
authors.forename: Vitali
authors.initials: V
authors.lastname: Zhaunerchyk