بررسي پاسخ دزيمتر ترمولومينسانس Dy:4CaSO به دز پرتوگاما

Investigation of CaS04:Dy Thermoluminescence Dosimeter Response to Gamma Ray Doses

CaS04:Dy thermoluminesconce dosimeter (TLD) is one of the best materials for environmental and personal dosimetry due to its high sensitivity and high dose saturation. In this investigation, the dose response of CaS04:Dy with three concentrations, 0.11, 0.15 and 0.2 mol% of dysprosium, to 60Co gamma rays doses up to 3.7Gy were studied. The effect of heating program on glow curve was also studied. The glow peaks of CaS04:Dy were seen at 100°C and 167°C. The pellets have high sensitivity and in the case of sample with 0.2 mol% of dysprosium, the relative sensitivity is 12. The dose response is found to be linear up to 3.7Gy and the fading was approximately about 36% in 10 days.