Curve fitting algorithms are widely used for the determination of trap parameters from thermoluminescence (TL) glow curves. Most of the algorithms are based on the general order kinetics (GOK) model. In this paper, we study the accuracy of GOK model in application to the analysis of TL curves. It is shown that in many cases especially characterized by high retrapping coefficients, the GOK model is not applicable giving erroneous estimation of the activation energy. To overcome the difficulty a novel fitting algorithm is suggested based on the quasi equilibrium approximation. The algorithm allows to analyze a single TL peak as well as to deconvolute complex TL curves. Using numerically generated TL spectra the preciseness and stability of the method is verified.
展开▼
