Accuracy of the activation energy calculated from a thermoluminescence glow-peak using a method that uses three points on the peak

This paper shows that the limitations of the general-order and peak-shape methods of kinetic analysis in cases where the retrapping probability greatly exceeds the recombination probability may be avoided if the analysis method proposed by Rasheedy [6–8] is applied. Analysis of computer simulated glow-curves using the general-order, peak-shape, and Rasheedy's protocol showed that Rasheedy's method gave the best agreement between calculated and default values. The accuracy of the method improved for data selected well below 10% of the peak maximum in the initial-rise region of a glow-peak. The observed improvement has been attributed to the fact that in the initial-rise region, the quasiequilibrium condition is better satisfied than at the higher temperature end of the glow-peak. In general, we find that when the retrapping probability increases, the analysis for kinetic parameters is better carried out on data selected well below 10% of maximum peak intensity. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)