The diffusion of Pd atoms in iron doped with 119Sn studied by Mossbauer spectroscopy

摘要: The aggregation at 673 K of Pd atoms in the first-neighbour shell a 119Sn atom dissolved iron is followed by Mossbauer spectroscopy 119Sn. author deduces jump frequency 3.5*10-4 s-1 leading to diffusion constant D=3.6*10-20 cm2 s-1, whereas value obtained extrapolating measurements literature made between 1373 and 1523 5.0*10-22. difference attributed temperature dependence activation energy. He has also observed small change isomer shift nucleus as concentration increases, makes some comments on strength Pd-Sn bond first- second-neighbour distances alpha gamma iron.