Thickness inhomogeneity and fluorescence effects in EXAFS spectroscopy for powder samples: solution of the inverse...

For thin powder samples EXAFS spectra are often suffered from thickness inhomogeneity and for thick samples from fluorescence at energies above edge absorption. As a result EXAFS amplitude is decreased and information about the coordination numbers is distorted. For correction of x-ray absorption spectra on inhomogeneity and fluorescence effects we propose a new method of solving an inverse problem. Model calculations are carried out. This method is applied to preliminary processing EXAFS spectra for Ni-Mn alloys.