Computational Method of X-Ray Harmonic Elimination in EXAFS Treating

Ph.M. Ovsjannikov Institute of Physics, Rostov State University, Stachky Ave. 194, Rostov on Don 344104, Russia

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The computational method of EXAFS amplitude correction by harmonics elimination and intensity leakage assessment has been worked out. In conventional absorption measurements, the major sources of errors are the transition of harmonics by the monochromator and inevitable leakage of radiation around and (or) through the sample. In this paper we present the method of the effective corrections being based on the measurements of the intensity of X-ray radiation passed through calibrated metal foils both without and together with investigated samples. As the advantage of the method one may emphasise the fact that it does not require any additional data for the investigated samples such as chemical composition, density, table absorption coefficients.

DOI: 10.12693/APhysPolA.86.749 PACS numbers: 78.70.Dm, 87.64.Fb