Anwendung der Kernreaktionsmethode zur Untersuchung der Diffusion von Deuteronen in mono- und polykristallinen Nickel-Absorbern

The isothermic diffusion (T=254 K) of implanted deuterons in single- and polycristalline nickel absorbers is studied by means of theD(d,p)T nuclear reaction. At high doses the mobility of the implanted deuterons is drastically reduced, which is connected with the radiation damage caused by the implantation process itself. On the other hand at low doses the deuteron distributions change as predicted by the common diffusion law of Fick. The applied nuclear reaction technique permits the direct observation of ion distributions in an absorber and their changes by diffusion—without any influence of the surface conditions on the evaluation. The method can be applied successfully in the study of slowly changing ion distributions (small diffusion coefficients).