Abstract
The copper activated calcium tetraborate (CaB4O7:Cu) nanophosphor was synthesized by a combination of facile co-precipitation and thermal treatment methods for the first time. Thermoluminescence and dosimetric characteristics of the gamma irradiated CaB4O7:Cu nanophosphor was reported. The glow curves shows two well resolved TL peaks centered at about 120°C and 260°C. The copper concentration was varied from 1 to 3mol% and it was found that the nanocrystalline CaB4O7:Cu with a dopant concentration of 2mol% has the highest sensitivity among the other dopant concentrations. The results demonstrated that copper can enhance TL efficiency to 2.26 times more than that of un-doped nanocrystalline samples. Moreover, the dose response of the dosimetric peak at 260°C follows a good linearity up to 3kGy whereas the linearity of lower temperature peak at 120°C extended up to 30Gy. The linearity characteristic of the present nanophosphor suggests it as a candidate towards dosimetric applications.
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