ON THE MIXED ORDER KINETICS OF THE THERMOLUMINESCENCE GLOW PEAK

The shape factor of a thermoluminescence (TL) glow peak following mixe d order (MO) kinetics has been reinvestigated. A modification of the e xisting equation of MO kinetics to include the filling factor f (f = n (0)/N, where no is the initial concentration of trapped electrons and N is the concentration of the electron trap sites) has been proposed. The shifting of peak temperature for a MO kinetics peak with the chang e of filling factor and hence the irradiation dose absorbed by the sam ple is reported. A new set of expressions fdr the evaluation of the ac tivation energy of a TL peak in the light of MO kinetics is presented. The applicability of the MO kinetics model is reported by fitting bot h the numerically simulated glow peak and the experimentally observed peak of gamma-irradiated NaCl:I and x-irradiated BeO.