Dose dependence of the substitutional fraction of Xe implanted in Fe

By means of the nuclear orientation technique a systematic study of the behaviour of xenon implanted in iron has been done. Strong evidence for the dose dependence of the substitutional fraction is shown. Radiation damage during implantation is obviously the cause of this phenomenon. By means of a general mathematical model one can describe what happens during implantation. A physical two-site model derived from the general one enabled us to explain the dose dependence of the substitutional fraction. At the same time, the dependence of the substitutional fraction on other parameters as temperature and ion flux appears in the equations.