Development of NaCl Salt as a Reusable Gamma Radiation Dosimeter
Journal Title: International Journal of Engineering and Science Invention - Year 2017, Vol 6, Issue 8
Abstract
NaCl salt is a well-known material that can be used just one time for retrospective dosimetryin radiation accidents. After first time of use, the sensitivity of NaCl drops dramatically and its TL glow curve changes significantly. In the presentresearch, 5 batches of NaCl salt are prepared in forms of chips (each 20 ± 2.5 % g). All batcheswere subjected to heating rate 10oC/min and kept for 1 hour at different annealing temperatures namely, 200, 300, 400, 500 and 600 oC respectively; after annealing, the batcheswere quenched at room temperature. The batches have been sensitized with a dose of 5 Gy using Cs137 gamma radiation source and their TL responses were measured. It has been found that TL response was enhanced as the annealing temperature increases showing maximum response at 500 oC and then drops afterwards; enhancement in TL response of 500 oC annealed batch is more than 500% compared to the un-annealed batch. Further investigation showed that both the glow curve and the TL response have no change as the NaCl chips reirradiated with gamma radiation showing a linear dose response up to 10 Gy. Finally, kinetic parameters have been deduced using Computerized Glow Curve Deconvolution (CGCD). CGCD analysis showed that the glow curve of 500 oC annealed group consists of 5 1st order glow peaks. The results obtained in this study indicate that annealed NaCl salt at 500 oC could be used as a reusable and efficient gamma radiation dosimeter.
Authors and Affiliations
H. Amer
Keywords
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