W. Petry, G. Vogl, W. Mansel
Jun 1, 1981
In earlier work on polycrystalline samples [I] interstitials have been produced by irradiation with 3 MeV electrons above defect annealing stage I. The highly mobile interstitials were trapped at the 57Co impurities and gave rise to a new M~ssbauer line (defect line). From the sudden decrease of the apparent f-factor by a factor of more than four at T>13K it was concluded that the 57Fe atom was performing a restricted diffusion motion in a cage within one A1 fcc cell.