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Complete dissociation branching fractions and Coulomb explosion dynamics of SO2 induced by excitation of O 1s pre-edge resonances
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 9
2015 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 143, no 13, 134302Article in journal (Refereed) Published
Abstract [en]

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 S2+ fragments of equal mass-to-charge ratio, the measurements have been performed with the isotopically enriched (SO2)-O-18 sample. By analysis of the complete set of the fragment momentum vectors, the beta values for the fragments originating from the SO+ + O+ break-up and the kinetic energy release for fragmentation channels of both SO22+ and SO23+ parent ions are determined. We also present results on the three-body break-up dynamics.

Place, publisher, year, edition, pages
2015. Vol. 143, no 13, 134302
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-122939DOI: 10.1063/1.4931645ISI: 000362669400025OAI: oai:DiVA.org:su-122939DiVA: diva2:870066
Available from: 2015-11-13 Created: 2015-11-11 Last updated: 2017-12-01Bibliographically approved

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