Study of dosimetric properties of Yb and Ce doped BaF2 nanophosphor

In the present work, we have synthesized nanocrystalline Yb and Ce doped BaF2 phosphor using wet chemical method. Size and functional group identification of this nanophosphor has been carried out by X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) techniques. It is found to be FCC structure with average crystallite size of around 32 nm and FTIR shows the presence of C=C, O-H, C-H, and F-Ba-F bonds. The luminescent properties of Yb and Ce doped BaF2 nanophosphor was characterized by Thermoluminescence (TL) technique. TL glow curve of gamma ray irradiated BaF2:Yb shows distinct peak at 158 oC, and BaF2:Ce shows two peaks at 175 oC and 275 oC. In dosimetric properties, we also estimated the kinetics parameters (i.e. activation Energy, order of kinetics and frequency factor), fading and reproducibility etc.