UV ray-induced thermoluminescence study of Y2SiO5:Ce3+ phosphor

摘要

This paper reports thermoluminescence (TL) properties of Ce3+ doped yttrium silicate phosphor. The phosphor is synthesized by a solid state reaction method which is suitable for large scale production. Starting materials used for sample preparation were Y2O3, SiO2, CeO2 and a fixed concentration of boric acid used as a flux. The prepared phosphors for different concentrations of Ce3+ were examined by observing their TL glow curves for UV irradiation (254-nm source). The samples show a well resolved broad peak covering a temperature range of 50-375 A degrees C. The kinetic parameters such as activation energy, order of kinetics and frequency factor were calculated by the peak shape method. Most of the peaks show general order kinetics. The effect of UV exposure on TL was also examined and a linear response to dose was shown, indicating the sample may be useful for a TL dosimeter. The kinetic parameters were calculated using a computerized glow curve de-convolution (CGCD) technique.