High energy resolution x-ray absorption spectroscopy study of uranium in varying valence states

被引：77
|
作者：
Vitova, T. [1 ]
Kvashnina, K. O. [2 ]
Nocton, G. [3 ]
Sukharina, G. [4 ]
Denecke, M. A. [1 ]
Butorin, S. M. [5 ]
Mazzanti, M. [3 ]
Caciuffo, R. [6 ]
Soldatov, A. [4 ]
Behrends, T. [7 ]
Geckeis, H. [1 ]
机构：
[1] Karlsruhe Inst Technol, Inst Nucl Waste Disposal INE, D-76021 Karlsruhe, Germany
[2] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France
[3] CEA Grenoble, SCIB CEA UJF, Lab Reconnaissance Ion & Chim Coordinat, INAC,UMR E 3, F-38054 Grenoble 09, France
[4] So Fed Univ, Fac Phys, Rostov Na Donu 344090, Russia
[5] Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden
[6] Commiss European Communities, Joint Res Ctr, ITU, D-76125 Karlsruhe, Germany
[7] Univ Utrecht, Fac Geosci, NL-3508 Utrecht, Netherlands
来源：
PHYSICAL REVIEW B | 2010年 / 82卷 / 23期
关键词：
OXIDATION; PLUTONIUM;
D O I：
10.1103/PhysRevB.82.235118
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：6
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