C
Christophe Den Auwer
Researcher at French Alternative Energies and Atomic Energy Commission
Publications - 13
Citations - 486
Christophe Den Auwer is an academic researcher from French Alternative Energies and Atomic Energy Commission. The author has contributed to research in topics: Absorption spectroscopy & Extended X-ray absorption fine structure. The author has an hindex of 9, co-authored 13 publications receiving 454 citations. Previous affiliations of Christophe Den Auwer include Australian Nuclear Science and Technology Organisation.
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Journal ArticleDOI
Higher Order Speciation Effects on Plutonium L3 X-ray Absorption Near Edge Spectra
Steven D. Conradson,Kent D. Abney,Bruce D. Begg,Erik D. Brady,David Clark,Christophe Den Auwer,Mei Ding,Peter K. Dorhout,Francisco J. Espinosa-Faller,Pamela L. Gordon,Richard G. Haire,Nancy J. Hess,Ryan F. Hess,D. Webster Keogh,Gerard H. Lander,Anthony J. Lupinetti,Luis A. Morales,Mary P. Neu,P.D. Palmer,Patricia Paviet-Hartmann,Sean D. Reilly,Wolfgang Runde,C. Drew Tait,and D. Kirk Veirs,Franck Wastin +24 more
TL;DR: This large database of X-ray near edge absorption spectra for Pu(0-VII) are reported, extending the known correlations between the energy and shape of these spectra from the usual association of the XANES with valence and site symmetry to higher order chemical effects.
Journal ArticleDOI
Investigating Actinyl Oxo Cations by X-ray Absorption Spectroscopy
TL;DR: In this paper, the authors present a detailed analysis of molecular actinide cations using both XANES and EXAFS tools, showing that the LIII edge, located in the hard X-ray region, provides a useful fingerprint of the cation polyhedron.
Journal ArticleDOI
Charge Distribution and Local Structure and Speciation in the UO2+x and PuO2+x Binary Oxides for x <0.25.
Steven D. Conradson,Bruce D. Begg,David Clark,Christophe Den Auwer,Mei Ding,Peter K. Dorhout,Francisco J. Espinosa-Faller,Pamela L. Gordon,Richard G. Haire,Nancy J. Hess,Ryan F. Hess,D. Webster Keogh,Gerard H. Lander,Dario Manara,Luis A. Morales,Mary P. Neu,Patricia Paviet-Hartmann,Jean Rebizant,Vincenzo V. Rondinella,Wolfgang Runde,C. Drew Tait,D. Kirk Veirs,P. Villella,Franck Wastin +23 more
TL;DR: The local structure and chemical speciation of the mixed valence, fluorite-based oxides UO{sub 2+x} (0.00=
Journal ArticleDOI
Local and Nanoscale Structure and Speciation in the PuO2+x-y(OH)2y·zH2O System
Steven D. Conradson,Bruce D. Begg,David Clark,Christophe Den Auwer,Mei Ding,Peter K. Dorhout,Francisco J. Espinosa-Faller,Pamela L. Gordon,Richard G. Haire,Nancy J. Hess,Ryan F. Hess,D. Webster Keogh,Luis A. Morales,Mary P. Neu,Patricia Paviet-Hartmann,Wolfgang Runde,C. Drew Tait,D. Kirk Veirs,Phillip M. Villella +18 more
TL;DR: The most accurate description of PuO (2) is therefore PuO(2+x-y)(OH)(2)(y).zH(2)O, with pure, ordered, homogeneous PuO.(2) attained only when H(2]O is rigorously excluded and the O activity is relatively low.
Account / Revue Combining theoretical chemistry and XANES multi-edge experiments to probe actinide valence states
Clara Fillaux,Jean-Claude Berthet,Steven D. Conradson,Philippe Guilbaud,Dominique Guillaumont,Christoph Hennig,Philippe Moisy,Eric Simoni,David K. Shuh,T. Tyliszczak,Ingrid Castro-Rodriguez,Christophe Den Auwer +11 more
TL;DR: In this article, C. Fillaux et al. used XANES spectroscopy to probe the actinides' frontier orbitals and then understand the cation reactivity toward chelating ligands.