A study on thermoluminescence dosimetric properties of CaMoO_4:Cu nanophosphor

摘要

We report here, the structural, morphological and dosimetric properties of CaMoO_4:Cu nanophosphor synthesized by simple hydrothermal method. ~(60)Co gamma source was used for the study of Thermoluminescence (TL) dosimetric properties. The synthesized powder of CaMoO_4:Cu nanophosphor was characterized by X-ray diffraction method and found to have a tetragonal structure with ～45 nm crystallite size. FTIR shows the formation of functional group. The morphological study of the CaMoO_4:Cu nanophosphor was done by SEM and confirmed petal like structure. The gamma ray irradiated CaMoO_4:Cu nanophosphor samples were studied by thermoluminescnce method, where a single dosimetric peak observed at 398°K. It was observed that the intensity of the thermoluminescence peak increased linearly from 500 Gy to 10 kGy dose of gamma rays and further saturates. The trapping parameters and optimum fitting parameters was calculated using GCD method.