EFFECT OF LARGE GAMMA-IRRADIATION DOSES ON CONVERSION EFFICIENCY AND LIGHT OUTPUT OF CSI(TL) SCINTILLATORS

The processes of the creation and evolution of lattice defects under s trong gamma-irradiation are essentially simplified in the case of a la ttice where initial defects remain unchanged under irradiation and new defects grow due to the creation and coalescence of vacancies. Radiat ion-induced changes in the conversion efficiency of such ''ideal'' sam ples are described by a simple relationship which can be directly comp ared with experiment. Based on such approach, experimental statistics was analyzed and ''ideal'' samples were separated. As result, some inf erences on the mechanism of irradiation-induced changes are drawn.