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Uranium oxides investigated by X-ray absorption and emission spectroscopies
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics II.
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2006 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, no 15, 5615-5618 p.Article in journal (Refereed) Published
Abstract [en]

X-ray absorption and resonant X-ray emission measurements at the O 1s edge of the uranium oxides UO2, U3O8 and UO3 are presented. The spectral shapes of the O Kα X-ray emission spectra of UO3 exhibit significant excitation energy dependence, from an asymmetric to a symmetric form, which differs from those of UO2 and U3O8. This energy dependence is attributed to a significant difference in the oxygen–uranium hybridization between two different sites in the crystal structure of UO3. The spectral shapes of UO2 and U3O8 are also found to be different but without significant energy dependence. The experimental spectra of the valence and conduction bands of the uranium oxides are compared to the results of electronic structure calculations available in the literature.

Place, publisher, year, edition, pages
2006. Vol. 252, no 15, 5615-5618 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-83543DOI: 10.1016/j.apsusc.2005.12.131OAI: oai:DiVA.org:uu-83543DiVA: diva2:111451
Conference
Eight International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures and the Thirteenth International Congress on Thin Films — ACSIN8/ICTF13
Available from: 2007-02-13 Created: 2007-02-13 Last updated: 2017-12-14Bibliographically approved

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Magnuson, MartinButorin, SergeiWerme, LarsNordgren, Joseph

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