Title: High energy resolution X-ray absorption spectroscopy study of uranium in varying valence states
Authors: VITOVA T.KVASHNINA KristinaNOCTON G.SUKHARINA G.DENECKE M. A.BUTORIN S. M.MAZZANTI M.CACIUFFO RobertoSOLDATOV A.BEHRENDS T.GECKEIS Horst
Citation: PHYSICAL REVIEW B no. 82 p. 235118 (1-6)
Publisher: AMER PHYSICAL SOC
Publication Year: 2010
JRC N°: JRC59526
ISSN: 1098-0121
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC59526
DOI: 10.1103/PhysRevB.82.235118
Type: Articles in Journals
Abstract: High energy resolution X-ray absorption spectroscopy (XAS) study on U4+ (UO2), U5+ ([UO2Py5][KI2Py2]) and U6+ (UO2(NO3)2*(H2O)6) materials have been performed. We demonstrate the potential of this novel experimental technique for qualitative/semi qualitative and quantitative actinide speciation investigations and discuss its advantages over the standard XAS technique. For the first time a pre-edge feature in U L3 edge partial fluorescence yield X-ray absorption near edge structure (PFY-XANES) spectrum is observed and its origin explained by performing calculations with the FDMNES code based on the multiple scattering theory and the finite difference method. PACS numbers: 61.05.Cj, 78.70.Dm, 78.70.En, 71.20.-b
JRC Institute:Institute for Transuranium Elements

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