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R. F. Fink, A. Eschner, M. Magnuson, O. Björneholm, I. Hjelte, C. Miron, M. Bässler, S. Svensson, M.N. Piancastelli, and S. L. Sorensen
Specific production of very long-lived core-excited sulphur atoms by 2p-sigma excitation of the OCS molecule followed by ultrafast dissociation
J. Phys. B 39, L269 (2006)

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 → σ* 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.

Link to the complete paper (if available):
http://www.iop.org/EJ/article/0953-4075/39/12/L03/b6_12_l03.pdf


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