ESR STUDY OF CASO4-DY TLD

Electron spin resonance spectroscopy was used to study the radiation i nduced paramagnetic centres in the polycrystalline CaSO4:Dy phosphor. Three dose-dependent signals were detected whose amplitude can be used for dosimetry in the (5-2000) Gy dose range. SO3-, SO4- and Ca-vacanc y centres were regarded as responsible for the signals observed. Step annealing measurements suggest a connection between these centres and some thermoluminescent glow peaks. Copyright (C) 1996 Elsevier Science Ltd