Specific production of very long-lived core-excited sulfur atoms by 2p-1sigma excitation of the OCS molecule followed by ultrafast dissociation

A core-excited sulfur state with a lifetime almost one order of magnitude longer than in molecular 2p core-hole states is selectively produced by ultrafast dissociation of S 2p - > sigma* excited OCS. Clear evidence for this is provided by strong atomic peaks (20% of the total intensity) in x-ray...

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Published inJournal of physics. B, Atomic, molecular, and optical physics Vol. 39; no. 12; pp. L269 - L275
Main Authors Fink, Reinhold F, Eschner, Annika, Magnuson, Martin, Bjorneholm, Olle, Hjelte, Ingela, Miron, Catalin, Bassler, Margit, Svensson, Svante, Piancastelli, Maria Novella, Sorensen, Stacey L
Format Journal Article
LanguageEnglish
Published 28.06.2006
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Summary:A core-excited sulfur state with a lifetime almost one order of magnitude longer than in molecular 2p core-hole states is selectively produced by ultrafast dissociation of S 2p - > sigma* excited OCS. Clear evidence for this is provided by strong atomic peaks (20% of the total intensity) in x-ray fluorescence but very weak ones (2%) in the corresponding resonant Auger spectrum. Corroborating the assignment of the spectra, ab initio calculations explain the enhanced lifetime: the Auger decay of the produced 3D3 (2p53p5) sulfur state is strongly decreased as it contradicts a newly derived propensity rule of the L2,3MM Auger decay.
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ISSN:0953-4075
DOI:10.1088/0953-4075/39/12/L03