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 S18O2 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 SO3+2 parent ions are determined.We also present results on the three-body break-up dynamics.

Complete dissociation branching fractions and Coulomb explosion dynamics of SO2 induced by excitation of O 1s pre-edge resonances / Salén, Peter; Yatsyna, Vasyl; Schio, Luca; Feifel, Raimund; af Ugglas, Magnus; Richter, Robert; Alagia, Michele; Stranges, Stefano; Zhaunerchyk, Vitali. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - STAMPA. - 143:13(2015). [10.1063/1.4931645]

Complete dissociation branching fractions and Coulomb explosion dynamics of SO2 induced by excitation of O 1s pre-edge resonances

SCHIO, LUCA;STRANGES, Stefano;
2015

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 S2+ fragments of equal mass-to-charge ratio, the measurements have been performed with the isotopically enriched S18O2 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 SO3+2 parent ions are determined.We also present results on the three-body break-up dynamics.
dissociation; SO2; synchrotron radiation; Coulomb explosion; 3D ion imaging; core electron excitation
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Complete dissociation branching fractions and Coulomb explosion dynamics of SO2 induced by excitation of O 1s pre-edge resonances / Salén, Peter; Yatsyna, Vasyl; Schio, Luca; Feifel, Raimund; af Ugglas, Magnus; Richter, Robert; Alagia, Michele; Stranges, Stefano; Zhaunerchyk, Vitali. - In: THE JOURNAL OF CHEMICAL PHYSICS. - ISSN 0021-9606. - STAMPA. - 143:13(2015). [10.1063/1.4931645]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/835306
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