The influence of thermal annealing on the characteristics of different AL2O3 thermoluminescence dosimeters

The manufacturers of TL detectors usually recommend the annealing temperature and time, however they do not give instructions about the heating and cooling rates. From the aspect of practical routine work, every laboratory has to find the optimum heating and cooling method. In this work the influence of various parameters of annealing on the properties of TL dosimeters (sensitivity, reproducibility, the shape of the glow curve) was investigated. Various Al2O3:dosimeters were used. The TL dosimeters based on Al2O3 can be used in different dose ranges depending on the crystal structure of the dosimeter material as well as the kind and concentration of the activator. In this work Al2O3:C4 and Al2O3:Mg,Y with 0.5% and 1% of activator were investigated