Emanation of 54Mn and 57Co impurity “hot” atoms from metal iron upon annealing the radiation damage

Irradiation of metallic iron with intense (10 µА) beams of deuterons (Ed - 9.0/8.2 MeV; fluence, 1.0×1022 m−2) is accompanied by the formation of a metastable γ-phase in the bulk of metal. Short annealing at low temperature (at (873±5) K for 10 min) of irradiated samples leads to a degradation of the γ-phase of iron, to a reversion of the irradiated metal into the low-temperature state of α-Fe, which is typical at room temperature, and is followed by a higher emanation of 54Mn atoms into the gaseous phase (almost by two orders of magnitude higher as compared to the vapor pressure values under this temperature). The results that are principally coincident with the ones given above (accelerated transport and subsequent excessive emanation of the “hot” atoms into the gaseous phase) have been obtained for 57Co as well.