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Probing the valence character of O-1s -> Rydberg excited O-2 by participator Auger decay measurements and partial ion yield spectroscopy following x-ray absorption
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
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2007 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 126, no 17, 174304- p.Article in journal (Refereed) Published
Abstract [en]

The valence character of O 1s -> Rydberg excited O-2 is investigated by means of participator Auger decay spectroscopy, performed at selected photon energies across the K-shell resonance region, and by means of partial ion yield x-ray absorption spectroscopy. For several of the excitation energies studied, the authors find substantial sigma(*)((4)Sigma(-)(u),(2)Sigma(-)(u)) valence character being mixed with ns sigma and np sigma ((4)Sigma(-)(u),(2)Sigma(-)(u)) Rydberg states. An experimental indication of a coupling between the channels associated with quartet and doublet ion cores is considered and discussed. New spectroscopic constants are derived for the singly ionized X (2)Pi(g) state of O-2 based on the observation of at least 20 vibrational sublevels.

Place, publisher, year, edition, pages
2007. Vol. 126, no 17, 174304- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-144709DOI: 10.1063/1.2723745ISI: 000246284800012OAI: oai:DiVA.org:uu-144709DiVA: diva2:394290
Available from: 2011-02-02 Created: 2011-02-02 Last updated: 2017-12-11Bibliographically approved

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