Correction of X-ray absorption spectra for thickness inhomogeneity and fluorescence of sample

For thin powder samples, the EXAFS spectra are often tumpered due to the th ickness inhomogeneity, and, thick samples, due to the fluorescence at energ ies above the absorption edge. As a result, the EXAFS amplitude decreases a nd information about the coordination numbers is distorted. To correct the X-ray absorption spectra for inhomogeneity and fluorescence effects, we pro pose a new method, which comes to solve the inverse problem. Model calculat ions were carried out. This method is applied to preliminary processing EXA FS spectra for Ni-Mn alloys. (C) 2001 Elsevier Science B.V. All rights rese rved.