Thermoluminescence properties of Tb doped Mg2SiO4 after beta irradiation
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Date
2019
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Abstract
In this study, we performed Thermoluminescence (TL) experiments to extract the trapping parameters and dosimetric properties of Tb-doped Mg2SiO4 phosphors. Glow peaks located at 193, 270, and 350 °C were observed in the glow curve but the peak at 193 °C was especially investigated as a dosimetric peak in this study. We also observed an anomalous heating rate effect in which the maximum TL intensity of the glow curve augmented with an increasing heating rate. The computerized glow curve deconvolution (CGCD) method, initial rise (IR) and Hoogenstraaten's method were used to determine the activation energies of associated trapping centers for both BSL-TL 365 nm and IRSL-TL wideband blue filters. The TL characteristics of this phosphor indicate that Mg2SiO4:Tb3+ could be a promising material for dosimetric applications. Efforts should be made to improve the fading behaviour by adding other activators as co-dopants. © 2019 Elsevier B.V.
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Activation energy , Dosimetry , Heating rate , Kinetic parameters , Magnesium compounds , Phosphors , Rare earths , Silicon compounds , Terbium , Anomalous heating , Beta irradiations , Dosimetric properties , Glow curve deconvolution , Mg2SiO4 , Thermoluminescence properties , Trapping centers , Trapping parameter , Thermoluminescence