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 thickness inhomogeneity, and, thick samples, due to the fluorescence at energies above the absorption edge. As a result, the EXAFS amplitude decreases and information about the coordination numbers is distorted. To correct the X-ray absorption spectra for inhomogeneity and fluorescence effects, we propose a new method, which comes to solve the inverse problem. Model calculations were carried out. This method is applied to preliminary processing EXAFS spectra for Ni–Mn alloys.