EXAFS Study of U(VI) Compounds: A New Approach to Data Analysis


EXAFS Study of U(VI) Compounds: A New Approach to Data Analysis

Babanov, Y. A.; Zayarnaya, T.; Reich, T.; Funke, H.

The regularization method is applied to determine three partial pair correlation functions (PCF) from one EXAFS spectrum. The mathematical procedure is discussed and applied to the EXAFS analysis of UO-2(HAsO4) x 4H2O.
The measurements were performed at the Rossendorf Beamline (ROBL) at the ESRF in Grenoble. The As K-edge and the U L3-edge absorption spectra were recorded in transmission mode at temperatures of 41 K and 15 K, respectively. From the U L3-edge EXAFS spectrum, we obtain the PCF's of the pairs U-U, U-As, and U-O and determine the structural parameters for the first and the second coordination shells of each pair. The PCF's of the pairs As-U, As-As, and As-O are obtained from the As K-edge EXAFS spectrum.

  • Lecture (Conference)
    Actinide-XAS-2000 Workshop Proceedings, Grenoble Sept. 10-12., 2000

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Publ.-Id: 3710