In:
MRS Proceedings, Springer Science and Business Media LLC, Vol. 1444 ( 2012)
Abstract:
Synchrotron-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 Cs 2 UO 2 Cl 4 crystal, which experimentally reveal a splitting of the σ, π, and δ components of the 6 d valence states [1], and characterization of UO 2 /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).
Type of Medium:
Online Resource
ISSN:
0272-9172
,
1946-4274
DOI:
10.1557/opl.2012.1159
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2012
