Positron Beam Studies of Radiation Damage Induced by Various Energy Heavy Ions of Xe²⁶⁺ in Iron

Abstract

Experimental studies of pure iron exposed to Xe 26+ irradiation are reported. Implantations were made with the fluence of 5 × 10 13 ions/cm 2 using 167 MeV ions moderated to 122.5, 77.0, and 44.5 MeV. Investigations were performed with variable energy positron beam (VEP). Doppler broadening spectroscopy (DB) was applied. The analysis of obtained results gives information about the presence of various kind of open-volume defects. Two layers with different values of positron diffusion lengths were found in implanted samples. The deeper one was more defected.