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

Reinhold F. Fink, Annika Eschner, Martin Magnuson, Olle Bjorneholm, Ingela Hjelte, Catalin Miron, Margit Bassler, Svante Svensson, Maria Novella Piancastelli, Stacey Ristinmaa Sörensen

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13 Citations (SciVal)

Abstract

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 D-3(3) (2p(5)3p(5)) sulfur state is strongly decreased as it contradicts a newly derived propensity rule of the L2,3MM Auger decay.
Original languageEnglish
Pages (from-to)L269-L275
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume39
Issue number12
DOIs
Publication statusPublished - 2006

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

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