General order kinetics thermoluminescence behavior of zinc oxide

Abstract

In this thesis,the thermoluminescence glow curves of zinc oxide has been investigate theoretically in view of general order kinetics.The effects of various thermoluminescence kinetic parameters such as the activation energy(E),the frequency factor(s),the order of kinetics(b)on the properties of the glow curves and the variation of concentration of electron in the trap has been studied. As activation energy increases the glow curve shifts to higher temperatures with a decrease in the height. For higher E values or deeper traps more energy or higher temperature is needed to release the charge carriers. Therefore, similar changes can be noticed as the parameter s is varied but now in the opposite way: As frequency factor s increases the peak shifts to lower temperatures with an increase of the height and a decrease in width. A trapping center with a high frequency factor needs less energy or it needs lower temperature to free a charge carrier