Application of Positron Annihilation Spectroscopy to the Study of Irradiated Fe-Cr alloys

Positron annihilation spectroscopy (PAS) contributes to the investigation of irradiated Fe-based alloys (incl. ODS steels) mainly because of the sensitivity to sub-nm-size open-volume defects. The unique combination of conventional and new PAS techniques, of ion irradiation facilities and hot cell labs available at HZDR are briefly introduced. Gamma-induced PAS (GiPS) is particularly well adapted to neutron-irradiated alloys. Monoenergetic PAS (MePS) is particularly well adapted to ion-irradiated alloys. The comparison and transferability of damage caused by ions and neutrons is an issue. First results on sets of both neutron-irradiated reactor pressure vessel steels and ion-irradiated Fe-Cr alloys addressed in the talk are encouraging.