Features of highly sensitive thermoluminescence dosimetry Ag3PO4:li nanophosphor under gamma irradiation

Abstract

AbstractIn this work, new synthetic nanophosphor materials of Li+ doped Ag3PO4 orthophosphate were prepared with different impurity concentrations. The coprecipitation method was utilized in the preparation at room temperature. The prepared nanophosphors were characterized via x-ray diffraction and high-resolution transmission electron microscopy, and the results confirmed the existence of nanoparticles. The thermoluminescence properties of samples with different concentrations of Li-cohost salt were extensively studied. The Ag3PO4 sample doped with 5 Wt% of Li (i.e. APL5) impurity revealed the highest thermoluminescence intensity of any of the other compositions, according to the thermoluminescence response of the synthesized nanophorsphors. All the studied samples were subjected to optimum thermal annealing of 500 °C for 1 h and readout with thermoluminescence reader at a heating rate of 5 °C/s. The APL5 nanophosphor samples revealed a good linearity dependence of thermoluminescence response against gamma dose within the range of 15–100 Gy. This sample showed a relatively low rate of fading of about 19% within two months of storage and good reusability. These characteristics make the newly prepared APL5 phosphor highly considered as a new potential thermoluminescence dosimeter and can be efficiently used in various γ-radiation detection applications.