Investigation of the Thermoluminescence Properties and Kinetic Parameters of Natural Salt Extracted from Kozluk, Batman after Exposure to Beta Radiation

In the present research, thermoluminescence properties and kinetic parameters of Kozluk natural salt obtained by the evaporation method were investigated. The irradiation of the Kozluk natural salt samples was carried out using a 90Sr/90Y β source in the Lexyg Smart TL/OSL reader device. This source provides a dose rate of 0.097 Gy per second to the sample. The TL glow curves obtained in the dose interval of 0.1 to 10 Gy show two distinct main peaks around 92 and 205°C. The dose-response relationship of the material exhibited super-linear characteristics in the 0.1–10 Gy range, as indicated by a slope of 1.1921. The reusability of the material was observed by irradiating 10 times under the same conditions, with the standard deviation remaining within the 5% dosimetric limit; this indicates that it provides high accuracy and reliability. The TL kinetic parameters were determined using the initial rise (IR), various heating rates (VHR), Tm-Tstop, and computerized glow curve deconvolution (CGCD) methods. It has been predicted that the entire TL glow curve consists of at least nine energy levels according to the CGCD analysis. The Figure of Merit (F.O.M), derived from the CGCD analysis, was 0.61%, demonstrating a good agreement between the experimental and theoretical data.