High energy resolution X-ray absorption spectroscopy study of uranium in varying valence states
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
VITOVA T.;
KVASHNINA Kristina;
NOCTON G.;
SUKHARINA G.;
DENECKE M. A.;
BUTORIN S. M.;
MAZZANTI M.;
CACIUFFO Roberto;
SOLDATOV A.;
BEHRENDS T.;
GECKEIS Horst;
2010-12-20
AMER PHYSICAL SOC
JRC59526
1098-0121,
https://publications.jrc.ec.europa.eu/repository/handle/JRC59526,
10.1103/PhysRevB.82.235118,
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