Energetic heavy ion irradiation effect in Fe layers studied by Mossbauer spectroscopy

Mossbauer spectroscopy was applied to study radiation damage in evaporated Fe layers irradiated with 209 MeV Kr-84 ions at room temperature. Significa nt differences have been shown between the Mossbauer spectra of the unirrad iated and the irradiated samples. The increase of a nonmagnetic component o f the spectra as well as a magnetic component around 270 kOe was observed d ue to the irradiation. The changes were also analysed using the hyperfine f ield distribution obtained from the spectra. The results can be interpreted as the formation and the increase of proportion of highly disordered phase s in Fe layer due to irradiation with energetic heavy ions.