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Pu M-edge x-ray absorption experiments were performed on a single crystal of PuSb in order to understand incongruous x-ray resonant exchange scattering (XRES) results from the same material. Analysis of the extended x-ray absorption fine structure (EXAFS) reveals that there is an amorphous or polycrystalline surface phase on the PuSb. The Pu at the surface of the crystal is coordinated primarily to a first-row main-group element, probably oxygen. In addition, the surface may be slightly deficient in antimony. These EXAFS results are sufficient to explain the absence of an XRES response in this PuSb sample.

Additional information

Authors: WASSERMAN S R, Argonne National Laboratory, Chemistry Division (US);SODERHOLM L, Argonne National Laboratory, Chemistry Division (US);REBIZANT J, JRC Karlsruhe (DE);LANDER G H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: Actinides '97, Baden-Baden (DE), 21-26 September 1997
Availability: Available from (1) as Paper EN 41177 ORA
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