EVALUATING TRAP PARAMETERS OF THERMOLUMINESCENCE GLOW-CURVES CONSIDERING TEMPERATURE DEPENDENT FREQUENCY FACTOR

Abstract

First and general order thermoluminescence glow curves were simulated in a MATLAB environment. The simulated curves considered the case when the pre-exponential or frequency factor is temperature dependent for kinetic orders ranging from 1.0 to 2.0. For each order the temperature dependent index was varied from -1 to +2. Simple and practicable analytic expressions were developed for evaluating the activation energy, order of kinetics and the temperature index of the frequency factor. The activation energies obtained using method developed in this report were very accurate and closer to the input values when compared to well-known peak shape and variable heating rate methods.