Measurements of the extended X-ray absorption fine structure (EXAFS) spectra at the K edges of cerium, praseodymium and samarium compounds with synchrotron radiation
- 10 November 1987
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 20 (31) , 5027-5035
- https://doi.org/10.1088/0022-3719/20/31/007
Abstract
Extended X-ray absorption fine structure (EXAFS) spectra at the K edges of CeF3, CeCl3, PrCl3, and SmCl3 hydrates were measured with monochromated synchrotron radiation. In spite of the decreasing resolving power of X-rays and the linewidth broadening intrinsic to the core-hole lifetime upon increasing the photon energies (Ce K edge at 40.45 keV, Pr at 42 keV and Sm at 46.85 keV), well separated EXAFS oscillations are obtained by using a double-crystal monochromator. Fourier transforms of these spectra were calculated in order to extract information on the radial distances of the nearest neighbours. The spectra and the Fourier transforms indicate the possibilities of EXAFS spectroscopy at high photon energies for elements with atomic numbers up to 62.Keywords
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