Adaptation of the OTOR-model to explain exactly the thermoluminescence processes during thermal excitation

Abstract

This paper presents a theoretical model to modify the three simultaneous differential equations of the one-trap and one-recombination center model (OTOR). This amendment will link the OTOR model to the general-order model of kinetics (GOK) to describe the thermoluminescence (TL) emission during thermal processes. The results of the new model are compared with the results of the experimental TL glow curves. The authors conclude that the empirical GOK-model is adequate to simulate the experimental glow curves, while the OTOR-model is inadequate to describe experimental glow peaks at different doses. In order to make the OTOR-model more equivalent to the GOK model, the paper introduces an adjustable parameter C, representing the concentration of inactive charge carriers due to non-radiative recombination in the thermally accessible traps of the OTOR model. The work is then extended to study the effect of this parameter on the shape of the TL glow curves, with special emphasis on the behavior of the high temperature side of the glow peaks.

Simulation of an Anomalous Behavior of Thermoluminescence Glow Peak of Quartz from Nigeria

“…The success of an undertaking like this, establishes the employed model for the particular phenomena investigated. Different models for each phenomenon has been considerably used; one example is one trap one recombination center model (OTOR) that has been used to simulate many experimental behaviors [9,29,30,32] despite the fact that it is a hypothetical system that has not been replicated in natural materials. Simulation of a complete quartz luminescence system using a single model has not been achieved.…”