Nanoparticles of cerium doped calcium fluoride (CaF 2 :Ce) were synthesized for the first time using the hydrothermal method. The formation of nanostructures was confirmed by X-ray diffraction (XRD) patterns, indicating cubic lattice structure for the particles produced. Their shape and size were observed by scanning electron microscopy (SEM). Thermoluminescence characteristics were studied by having the samples irradiated by gamma rays of 60 Co source. The optimum thermal treatment of 400 1C for 30 min was found for the produced nanoparticles. The T m −T stop and computerized glow curve deconvolution (CGCD) methods, used to determine the number of component glow peaks and kinetic parameters, indicated seven overlapping glow peaks on the TL glow curve at approximately 394, 411, 425, 445, 556, 594 and 632 K. A linear dose response of up to 2000 Gy, was observed for the prepared nanoparticles. Maximum TL sensitivity was found at 0.4 mol% of Ce impurity. Other TL dosimetry features, including reusability and fading, were also presented and discussed.
کلید واژگان :Nanoparticles Hydrothermal method Thermoluminescence CaF 2 :Ce
ارزش ریالی : 1200000 ریال
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