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Abstract

The results of X-ray scattering experiments on the antiferromagnetic uranium compounds UO(2), USb, and (U(0.85)Th(0.15))Sb are presented. The energy dependence of the X-ray scattering cross-section is reported in the range 3.5 to 3.9 keV, which includes the M(IV) and M(V) absorption edges. The energy dependencies are very similar and well represented by atomic resonance methodology. The major difference occurs in the ratio of intensities (branching ratio) of the two absorption edges, which is much larger in UO(2) than in the other materials. The results are in good agreement with ab initio calculations based on atomic physics, suggesting that measurements such as these are sensitive to the 5f electron configuration. Consistent with the calculated cross section, the magnetic scattering of the sigma-polarised incident beam is rotated to pi polarisation. No dramatic effects were found at the M(IV) edge of Th in the pseudobinary compound.

Additional information

Authors: TANG C C, University of Keele, Physics Department, Keele (GB);STIRLING W G, University of Keele, Physics Department, Keele (GB);LANDER G H, JRC Karlsruhe (DE);GIBBS D, Brookhaven National Laboratory, Physics Department, Upton, New York (US);HERZOG W, Brookhaven National Laboratory, Physics Department, Upton, New York (US);CARRA P, European Synchrotron Radiation Facility, Grenoble (FR);MATTENBERGER K, Laboratorium für Festkörperphysik, ETH, Zürich (CH);VOGT O, Laboratorium für Festkörperphysik, ETH, Zürich (CH)
Bibliographic Reference: Paper presented: 21. Journées des Actinides, Montechoro (PT), April 28 - May 1, 1991
Availability: Available from (1) as Paper EN 36081 ORA
Record Number: 199110770 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en