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.

引用

页数：6

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