Abstract
Calcium sulphide phosphors co-activated with varying concentration of bismuth & dysprosium have been prepared and their thermoluminescence has been studied systematically. The thermoluminescence intensity curves are analysed to determine the activation energy & frequency factor. The conclusion regarding the type of kinetics involved in the thermoluminescence has been discussed. The dependence of thermoluminescence intensity with irradiation dose has been studied by plotting the build-up curve. Measurements are made on sulphurised and unsulphurised samples and the conclusions are drawn regarding the nature of electron traps.
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