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Actinide Response under Pressure Probed by Inelastic X-ray Scattering

Published online by Cambridge University Press:  24 May 2012

J.-P. Rueff
J.-P. Rueff*
Affiliation:
Synchrotron SOLEIL, L’Orme des Merisiers, BP 48 Saint Aubin 91192, Gif sur Yvette, France. Laboratoire de Chimie Physique – Matière et Rayonnement, CNRS-UMR 7614, UPMC 75005 Paris, France
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Abstract

The electronic response of actinide systems under high-pressure conditions is undoubtedly of broad scientific interest but simultaneously very difficult to qualify. We will focus here on the use of inelastic x-ray scattering and its significance for actinides research through recent examples. IXS indeed combines several advantages that turn it into a powerful probe of the electronic and valence properties of f-electron systems. Besides element and orbital selectivity, resonant IXS can overcome core-hole lifetime broadening thus providing sharper spectral features and finer details about the electronic structure. Second, non-dipolar transitions are allowed in non-resonant IXS at high momentum transfer; thus “giant dipolar” Fano-like resonances that overwhelms the electron response at the O4,5 edges can be avoided. Recent results of IXS under pressure in Am and U under pressure are presented along with perspectives for actinides research at SOLEIL synchrotron.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1444: Symposium S/Y – Actinides and Nuclear Energy Materials , 2012 , mrss12-1444-y07-06
Copyright
Copyright © Materials Research Society 2012

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References

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