Author:
Denecke Melissa A.,Borchert Manuela,Denning Robert G.,de Nolf Wout,Falkenberg Gerald,Hönig Susanne,Klinkenberg Martina,Kvashnina Kristina,Neumeier Stefan,Patommel Jens,Petersmann Tobias,Pruessmann Tim,Ritter Stephan,Schroer Christian G.,Stephan Sandra,Villanova Julie,Vitova Tonya,Wellenreuther Gerd
Abstract
ABSTRACTSynchrotron-based X-ray techniques are used increasingly to characterize actinide element speciation in heterogeneous media related to nuclear waste disposal safety. Especially techniques offering added temporal, spatial and energy resolved information are advancing our understanding of f-element physics and chemistry in general and of actinide element waste disposal in particular. Examples of investigations of uranium containing systems using both highly (energy) resolved X-ray emission spectroscopy (HRXES) techniques and spatially resolved techniques with focused X-ray beams are presented in this paper: polarization dependent partial fluorescence yield X-ray absorption near edge structure (PD-PFY-XANES) spectroscopic studies of a single Cs2UO2Cl4 crystal, which experimentally reveal a splitting of the σ, π, and δ components of the 6d valence states [1], and characterization of UO2/Mo thin films prepared on different substrates using a combination of techniques (2D and 3D micro- and nano-X-ray fluorescence, XANES and both holographic and ptychographic tomography).
Publisher
Springer Science and Business Media LLC
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