ESR spectroscopy of gamma-irradiated Li2TiO3 ceramics

Electron spin resonance (ESR) studies have been made of lithium metatitanat e (Li2TiO3) ceramics irradiated by gamma-rays of Co-60 source at ambient an d liquid nitrogen temperatures (LNT). The ESR spectra have been found stron gly dependent on irradiation dose and temperature. The radiation defects in duced by gamma-irradiation at LNT were found to disappear almost completely by heating up to 225 K. In contrast to this, the radiation defects produce d by irradiation at ambient temperature showed tolerance of elevated temper atures recovering at about 600 K. (C) 2000 Elsevier Science Ltd. All rights reserved.