Modeling of thermoluminescence in SrY2O4:Eu3+and their concentration quenching effect

Abstract

In this work, we present mathematical models which describe the thermoluminescence process of SrY2O4 and their concentration quenching by europium (Eu3+) ions; experimental data used here have been previously published by V. Dubey et al. They studied the TL glow curve of Eu3+ doped SrY2O4 under UV exposure. In the first step of this study, the set of trapping parameters were evaluated using the general glow curve deconvolution program (GCD). These parameters are used to run the main program of the proposed models. The two electron traps-one-recombination center (2T1R) has been used to explain the TL output behavior in SrY2O4:Eu3+. Thermoluminescence intensity dependence on the excitation dose have been simulated for dose ranging from 1 × 105 cm−3 to 1 × 106 cm−3. An excellent linearity has been observed. The concentration quenching effect of TL in SrY2O4 by increasing of Eu3+ ions concentration will be studied by the same model (3T1R) proposed and published by R. Chen et al. Numerical results obtained here show a good agreement with the previously published paper for the SrY2O4 single crystal doped Eu3+ ions.