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|Title:||High energy resolution X-ray absorption spectroscopy study of uranium in varying valence states|
|Authors:||VITOVA T.; KVASHNINA Kristina; NOCTON G.; SUKHARINA G.; DENECKE M. A.; BUTORIN S. M.; MAZZANTI M.; CACIUFFO Roberto; SOLDATOV A.; BEHRENDS T.; GECKEIS Horst|
|Citation:||PHYSICAL REVIEW B no. 82 p. 235118 (1-6)|
|Publisher:||AMER PHYSICAL SOC|
|Type:||Articles in periodicals and books|
|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:||Nuclear Safety and Security|
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