Application of Na-22 Positron Source to the Investigation of Ion -Implanted Iron Samples

In the field of positron annihilation spectroscopy, the investigation of a thin near-surface region, modified with ion implantation, has been usually performed by slow positron beams. Experiments carried out to simulate radiation effects in Fe-based alloys, were reported widely in the past [1,2]. Radioisotope positron sources, such as Na-22, provide only a little information from the near-surface area, probing the hulk region particularly. With more and more accessible high-energy particle accelerators in research institutes, modified layers can reach up to several tens of micrometres into the bulk, enabling to use conventional Na-22 positron source for their investigation. This paper addresses some practical issues of the application of umnoderated radioisotope sources for the investigation of radiation effects in solids, simulated by ion implantation.