“…The Doppler broadened electron-positron annihilation c-radiation (CDBEPAR) spectrum has been measured by the HPGe detector. The peak to background (607-615 keV) ratio has been found to be 14,000:1 which allows successful analysis of the wing region [69,105,[147][148][149][150]. The energy per channel of the multichannel analyzer has been set to 22 eV.…”