Correction of XAFS amplitude distortions caused by the thickness effect

Absorption data measured using transmission mode in many cases are reduced due to a sample inhomogeneity. If the sample composition is known XAFS ampl itude can be restored by comparing of pre-edge absorption in a wide region with tabulated values or with experimental data for a uniform sample. In so me cases the sample thickness distribution can be restored and used to calc ulate true absorption. We propose to correct XAFS amplitude by constructing correcting function using pre-edge data without the restoring of the thick ness distribution. The comparison of the pre-edge absorption for inhomogene ous samples with the same composition can be used for relative scaling of d amped XAFS amplitudes or to check the samples homogeneity only.