Actinide and lanthanide speciation with high-energy resolution X-ray techniques
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Publication Details
Output type: Other
Author list: Vitova T, Denecke MA, Gottlicher J, Jorissen K, Kas JJ, Kvashnina K, Prussmann T, Rehr JJ, Rothe J
Publisher: IOP Publishing
Publication year: 2013
Journal: Journal of Physics: Conference Series (1742-6588)
Volume number: 430
Number of pages: 4
eISBN: *****************
ISSN: 1742-6588
eISSN: 1742-6596
Languages: English-Great Britain (EN-GB)
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Open access status: gold
Full text URL: https://iopscience.iop.org/article/10.1088/1742-6596/430/1/012117/pdf
Abstract
High-energy resolution X-ray absorption spectroscopy (HR-XAS) and Resonant inelastic X-ray scattering (RIXS) combined with quantum theoretical tools are gaining importance for understanding electronic and coordination structures of actinide (An) and lanthanide (Ln) materials. HR-XAS is successfully used to remove lifetime broadening by registering the partial fluorescence yield emitted by the sample, thereby yielding highly resolved X-ray absorption near edge structure spectra (HR-XANES), which often display resonant features not observed in conventional XANES. We demonstrate the structural characterization capabilities of these novel techniques by comparative discussion of U M-4/L-3-HR-XANES and L-3-valence band RIXS (L-3-VB-RIXS) spectra of two model U(VI) minerals. We show that the ab initio multiple scattering theory based code FEFF9.5 is an effective tool for calculations of An and Ln L-3-HR-XANES and L-3-RIXS spectra as it successfully reproduces dipole and quadrupole transitions in the same spectrum.
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