A simple model was proposed for the diffusion-controlled release of radioactive nuclei after implantation into a metal. A target of W was bombarded with

various Xe isotopic ions in order to test the model. Agreement with the model was good, and the data could be described by the expression:

D (cm2/s) = 1.4 x 10-11 exp[-110(kJ/mol)/RT]

E.Liatard, G.Gimond, G.Perrin, F.Schussler: Nuclear Instruments and Methods in Physics Research A, 1997, 385[3], 398-402