The effect of annealing and irradiation dose on the thermoluminescence glow peak of a monoclinic Gd2O3:Yb3+ phosphor

Abstract

A monoclinic Gd₂O₃:Yb³⁺ phosphor was prepared using the combustion synthesis method. This study is mainly centered on the thermoluminescence behaviour of this monoclinic Gd₂O₃:Yb³⁺ phosphor. TL glow curves were recorded for two different irradiations, UV and gamma irradiation. The effect of annealing temperature, irradiation dose and Yb³⁺ concentration on thermoluminescence behaviour is studied. Computerized glow curve deconvolution (CGCD) was applied using the peak fit method on the TL glow curve for optimized conditions. Kinetic parameters were calculated for the optimized TL glow curve as well as for the deconvoluted glow curve. The activation energy calculated for the gamma irradiated samples is greater than the UV irradiated samples, which is due to the deeper traps formed by gamma irradiation.