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Competition between decay and dissociation of core-excited carbonyl sulfide studied by x-ray scattering
Uppsala University.ORCID iD: 0000-0002-0317-0190
Uppsala University.
Uppsala University.
Uppsala University.
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1999 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 59, 4281-4287 p.Article in journal (Refereed) Published
Abstract [en]

We show evidence of dissociation during resonant inelastic soft x-ray scattering. Carbon and oxygen K-shell and sulfur L-shell resonant and nonresonant x-ray emission spectra were measured using monochromatic synchrotron radiation for excitation and ionization. After sulfur L2,3→π*, σ* excitation, atomic lines are observed in the emission spectra as a consequence of competition between de-excitation and dissociation. In contrast the carbon and oxygen spectra show weaker line-shape variations and no atomic lines. The spectra are compared to results from ab initio calculations. The discussion of the dissociation paths is based on calculated potential energy surfaces and atomic transition energies.

Place, publisher, year, edition, pages
1999. Vol. 59, 4281-4287 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-17470DOI: 10.1103/PhysRevA.59.4281OAI: oai:DiVA.org:liu-17470DiVA: diva2:209606
Note

Original Publication: Martin Magnuson, J. Guo, C. Såthe, J.-E. Rubensson, J. Nordgren, P. Glans, L. Yang, P. Sałek and H. Ågren, Competition between decay and dissociation of core-excited carbonyl sulfide studied by x-ray scattering, 1999, Physical Review A. Atomic, Molecular, and Optical Physics, (59), 4281-4287. http://dx.doi.org/10.1103/PhysRevA.59.4281 Copyright: American Physical Society http://www.aps.org/

Available from: 2009-06-08 Created: 2009-03-25 Last updated: 2013-10-02Bibliographically approved
In thesis
1. Electronic Structure Studies Using Resonant X-ray and Photemission Spectroscopy
Open this publication in new window or tab >>Electronic Structure Studies Using Resonant X-ray and Photemission Spectroscopy
1999 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis addresses the electronic structure of molecules and solids using resonant X-ray emission and photoemission spectroscopy. The use of monochromatic synchrotron radiation and the improved performance of the instrumentation have opened up the possibility of detailed analyses of the response of the electronic systems under interaction with X-rays. The experimental studies are accompanied by numerical ab initio calculations in the formalism of resonant inelastic scattering. The energy selectivity has made it possible for the first time to study how the chemical bonds in a molecule break up during resonant inelastic X-ray scattering. In the conjugated polymer systems, the element selectivity of the X-ray emission process made it possible to probe the different atomic elements separately. The X-ray emission technique proved to be useful for extracting isomeric information, and for measuring the change in the valence levels at different degrees of doping. In this thesis, spectral satellite features in transition metals were thoroughly investigated for various excitation energies around a core-level threshold. By measuring the relative spectral intensity of the satellites it was possible to extract information on the partial core-level widths. Using the nickel metal system as an example, it was shown that it is possible to probe the different core-excited states close toshake-up thresholds by measuring the relative spectral intensity variation of the Auger emission.Resonant photoemission measurements showed unambiguous evidence of interference effects. Theseeffects were also thoroughly probed using angle-dependent measurements. The combination of X-rayemission and absorption were useful for studying buried layers and interfaces due to the appreciable penetration depth of soft X-rays. X-ray scattering was further found to be useful for studying low-energy excited states of rare earth metallic compounds and transition metal oxides.

Place, publisher, year, edition, pages
Uppsala: Uppsala University, 1999
Series
Acta Universitatis Upsaliensis, ISSN 1104-232X ; 452
Keyword
Electronic structure, resonant x-ray emission, photoemission spectroscopy
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-56480 (URN)91-554-4463-6 (ISBN)
Public defence
(English)
Opponent
Available from: 2010-05-19 Created: 2010-05-18 Last updated: 2013-11-14Bibliographically approved

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