Pages: 45-51

Authors: Zdravko M. Vejnović, Miloš B. Pavlović,
Marina Kutin, and Milorad P. Davidović

Abstract

A new method for fitting glow curves, described in a mixed order kinetics model, with Gauss-Lorentz function is shown. Theoretical expressions of the mixed order kinetics model are shown in a new way, so that the values of kinetic parameters can be obtained through the geometric parameters. When the model is described in this way it is possible to calculate precisely  the kinetic parameters such as activation energy, pre-exponential factor and the factor α =n₀/ (h +n₀). At the same time, obtained values of geometric parameters of the experimental curve, which is described with the Gauss-Lorentz function, can be used to estimate the kinetic model, in which thermoluminescence relaxation occurs. This gives a possibility of a new application of Gauss-Lorentz function to be used as a criterion for assessing model of relaxation, when it is not known in advance. The accuracy of fitting is studied, for the specific cases of computer simulated thermoluminescent curves with one peak.

Key words: thermoluminescence, mixed order kinetics, general order kinetics, Gauss-Lorentz function

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