Abstract
Nanocrystalline lithium fluoride phosphors have been prepared by the chemical co-precipitation method at different pH values (7.0, 8.0 and 9.0). The formation of nanocrystalline structure has been confirmed by X-ray diffraction and transmission electron microscope. The thermolumniscence properties of lithium fluoride phosphors irradiated with gamma rays at different doses have been studied. The analysis of thermolumniscence glow curve has revealed the existence of two well resolved glow peaks, one low temperature peak at around 145 C and other one at higher temperature around 375 C. The LiF nano-crystallites synthesized at 8.00 pH have been found to show maximum thermolumniscence sensitivity at studied gamma doses (0.1 Gy–15 Gy).
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