A Bent Silicon Crystal in the Laue Geometry to Resolve Actinide X-Ray Fluorescence for X-Ray Absorption Spectroscopy
A. J. Kropf, J. A. Fortner, R. J. Finch, J. C. Cunnane and C. Karanfila
aIllinois Institute of Technology
A highly strained, curved silicon crystal in the Laue geometry has been used as a large area X-ray fluorescence analyzer for X-ray absorption spectroscopy. The analyzer is able to resolve the Lα fluorescence lines for neighboring actinide elements. A large gain in the signal-to-background ratio has been achieved for low levels of Mo, Np, and Pu in a UO2 matrix. We have determined the chemical state of these elementsin approved testing materials of uranium oxide spent nuclear fuel. Due to inelastic scattering from the predominant uranium, the concentration of Np measured, 0.6(2) mg Np/gram U, may be approaching the sensitivity limites for quantitative structural spectroscopy measurements.
© Physica Scripta 2005
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