Abstract
Abstract LiMgPO 4 :Tb 3+ phosphor was synthesized by solid state reaction. The thermally stimulated luminescence (TSL) glow curve of Tb doped LiMgPO 4 exhibits a main TSL peak at 170 °C with shoulders at 100 and 260 °C on either side of this peak. The TSL sensitivity of the phosphor was found to be about 2.5 times that of CaSO 4 :Dy phosphor. TSL emission and photoluminescence (PL) studies show that Tb 3+ ion acts as luminescence centre in this phosphor. The kinetic parameters, namely activation energy ( E ) and frequency factor ( s ) associated with the main glow peak have been determined using peak shape method. The activation energy and frequency factor obtained are 1.35 ± 0.03 eV and (6.53 ± 0.43) × 10 14 s −1 respectively. The paper discusses the dosimetric characteristics like dose response, fading, energy response and minimum detectable dose and results thereof.
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