USING AN IMPROVED PROCEDURE OF FAST DISCRETE FOURIER-TRANSFORM TO ANALYZE MOSSBAUER-SPECTRA HYPERFINE PARAMETERS

In this paper, the authors propose to supplement the mathematical processing of Mossbauer spectra (MS) by means of Fourier transforms using a regular algorithm with an iteration refinement method. The use of a priori information concerning the solution in the form of the condition of its nonnegativity allows to increase the resolution in the spectrum without the appearance of oscillations characteristic of the solutions obtained by the Fourier transform method alone. The MS of Fe-Si alloys of low concentration were processed according to the given computational scheme to evaluate the influence of the II and III coordination shells on the parameters of the hyperfine interaction on the Fe nucleus.