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

✍ Scribed by F. O. Ogundare; M. L. Chithambo

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 257 KB
• Volume: 3
• Category: Article
• ISSN: 1862-6351
• DOI: 10.1002/pssc.200521077

✦ Synopsis

Abstract

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)