Efficiency of defects formation in spinel under high energy electron and gamma beam irradiation

摘要

There were provided the comparative investigations of the efficiency of optical absorption centers formation in magnesiumudaluminates spinel (single crystals and ceramics) at the influence of high energy gamma or electron beams.udIt was revealed that at gamma irradiation in the single crystals and ceramics the most probably the hole centersudare formed which were created primarily at growth defects: cationic vacancies and anti-site defects. After electronudirradiation of different fluences in absorption spectra there were observed bands related to hole centers (defects inudthe cationic sub-lattice) which practically does not change, while the concentration of electron centers (defects in theudanion sub-lattice) grows proportionally to the electron fluence.