Citation
Haghiri, Maryam Erfani and Saion, Elias and Wan Abdullah, Wan Saffiey and Soltani, Nayereh and Hashim, Mansor and Navasery, Manizheh and Shafaei, Mohammad Ali
(2013)
Thermoluminescence studies of manganese doped calcium tetraborate (CaB4O7:Mn) nanocrystal synthesized by co-precipitation method.
Radiation Physics and Chemistry, 90.
pp. 1-5.
ISSN 0969-806X
Abstract
Manganese (Mn) doped bone-equivalent calcium tetraborate (CaB4O7) nanocrystals were synthesized using co-precipitation and thermal treatment techniques. The synthesized nanophosphors are found to possess the monoclinic structure and have the particle size about 9 nm. They showed good luminescence quantum efficiency and enough potential for radiation dose measurement in medical and industrial purposes. The variation of dopant concentrations was investigated from 0.1 to 2 mol% and it was found that the optimal concentration of 1.4 mol% Mn has the highest sensitivity among other concentrations. The results revealed that Mn enhance the thermoluminescence (TL) sensitivity about 80 times higher than the un-doped samples at 1 kGy and the TL response over a wide range of doses from 0.05 Gy to 2.0 kGy increased linearly with increasing the absorbed dose.
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