Studies on thermoluminescence properties of alkaline earth silicate phosphors

In this paper we report the Thermoluminescence behaviour of Sr3MgSi2O8 phosphor doped with Dy3+ synthesized by solid state reaction process. The prepared phosphors were characterized by the X-ray powder diffraction (XRD) method. The Thermoluminescence (TL) behaviour is studied for the 254 nm ultra violet (UV) exposure. The TL glow curve has dual peaks at 70 degrees C and 213 degrees C. All the TL parameters such as UV exposure time, dopant concentration, heating rate etc were optimized. The maximum TL intensity was found for 30 min UV exposure, 2.0 mol% Dy3+ Concentration and at 4 degrees C s(-1) heating rate. The Kinetic parameters namely, activation energy (E), order of kinetics (b) and frequency factor (s) of Sr3MgSi2O8:Dy3+ sample have been determined using Chen's method for the deconvoluted glow curve. (C) 2017 Elsevier B.V. All rights reserved.