An integrated PC program for evaluation of Fe-57 Mossbauer spectra bot
h from polycrystalline and from amorphous materials is proposed. The s
oftware structure and specifications, operating in a Microsoft Windows
environment, are discussed. The program is applied to the Mossbauer a
nalysis of a Fe-Cu alloy, using a version of the fitting procedure for
disordered systems developed to include evaluation of the grain-size
distribution function.