The effect of annealing on the thermoluminescence characteristics of Akçakent fluorites

In this study, natural fluorit ( ) material obtained from Kırşehir province of Akçakent region in Çiçekdağı Massif, is annealed from 350°C to 700°C by increasing the temperature with steps of 50°C for 0.5 and 1 hours, A respectively ferwards they were annealed for 6, 12, and 24 hours at 500°C and 550°C for the initial thermal treatment regime. In the initial rise thermal treatment regime, it was deduced that annealing at 550°C for 24 hour erased all the natural dose. In experiments to obtainin optimum annealing temperature, cyristal is annealed from 40°C to 100°C with en inceaments of 10°C for 24 hour. After each annealing TL intensities were recorded by giving 1 Gy dose. From the measurements it was observed that dose responses of TL glow-peaks have the highest points at 40°C. Furthermore the effect of various dose values between 0.5 Gy and 50 Gy and the effects of different heating rates on the TL glow peaks after 24 hours annealing were investigated. It was detected that peak intensities of all glow peaks increase linearly with increasing dose response; on the other hand, all glow peak intensities decrease with increasing heating rate.