Thermal quenching of thermoluminescence in TLD-200, TLD-300 and TLD-400 after β-irradiation

The dosimetric characteristics of many TL materials are influenced by changes in location, size and shape of the glow curves due to changes in the heating rate. In this study, the effect of heating rate on the integrated peak areas of CaF2:Dy (TLD-200), CaF2:Tm (TLD-300) and CaF2:Mn (TLD-400) crystals have been investigated after β-irradiation. It was observed that the peak temperatures of all peaks shifted to the high temperature sides and the integrated peak areas decrease as the heating rate increases due to thermal quenching, whose efficiency increases as temperature increases.

Research Highlights► In thermoluminescence, the glow curve is affected by some experimental parameters. ► Heating rate is one of the most important experimental variables. ► In this study, the effect of heating rate on the integrated peak areas of some CaF2 based crystals have been investigated after β-irradiation. ► It was observed that the peak temperatures of all peaks shifted to the high temperature sides. ► Also the integrated peak areas decrease as the heating rate increases due to thermal quenching, whose efficiency increases as temperature increases.