Study of the thermoluminescence mechanisms in LaAlO3: Ce, Dy crystals

In the present paper a complementary investigation about the mechanisms behind the thermoluminescence of LaAlO3:Ce,Dy crystals have been performed. The aim of this study is to present a model that, by using as guess values the parameters obtained by employing the GOK model, explain the role of Ce3+ and Dy3+ in the huge increase of the thermoluminescence signal of undoped LaAlO3 crystals. In the first section of this paper, the previous recorded TL glow peaks were further analyzed and their corresponding kinetic parameters such as order of kinetics (b), trap depth (E) and frequency factor (s) were determined; in this approach, the GCD analysis is mainly used to find the individual glow-peaks of a composite TL glow-curve and further to evaluate the sets of trapping parameters of each glow-peak.