Transfer of Sb-125 traces (similar to 10(-8) at. %) during plastic deformat
ion of irradiated metallic tin was studied, Abnormally fast migration [(1.1
+/- 0.2) x 10(-18) m(2) s(-1)] of the tin traces was revealed, The mechani
sm of the transfer by blocking of the impurity atoms with dislocations movi
ng in the course of rolling was proposed.