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High energy resolution x-ray absorption spectroscopy study of uranium in varying valence states
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2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 82, no 23, 235118- p.Article in journal (Refereed) Published
Abstract [en]

A high energy resolution x-ray absorption near-edge structure (XANES) spectroscopy study on U4+ (UO2), U5+ ([UO2Py5][KI2Py2]), and U6+ [UO2(NO3)(2)(H2O)(6)] demonstrates the potential of this experimental technique for qualitative/semiqualitative and quantitative actinide speciation investigations. We observe a pre-edge feature with quadrupole nature in a U L-3 edge partial fluorescence yield-XANES spectrum. This feature is a tool for characterizing the participation of 5f orbitals in U-O bonding. The feature origin is explained by performing calculations with the finite difference method near-edge structure code based on the multiple-scattering theory and the finite difference method.

Place, publisher, year, edition, pages
2010. Vol. 82, no 23, 235118- p.
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Physical Sciences
URN: urn:nbn:se:uu:diva-148480DOI: 10.1103/PhysRevB.82.235118ISI: 000286769100002OAI: oai:DiVA.org:uu-148480DiVA: diva2:402266
Available from: 2011-03-07 Created: 2011-03-07 Last updated: 2011-03-07Bibliographically approved

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