A novel TL/OSL MCaPO4:Ce (MÂ =Â Li, k) phosphor for radiation dosimetry

The polycrystaline MCaPO4:Ce (M = Li, K) phosphors were synthesiszed via solid state method. Structural properties of prepared MCaPO4:Ce (M = Li, K) phosphors are confirmed by X-ray diffraction (XRD). The optical properties were characterized by use of photoluminescence (PL), thermoluminescence (TL) and optically stimulated luminescence (OSL) techniques. The XRD pattern of MCaPO4:Ce (M = Li, K) phosphor fully matched with the Internatonal center for diffaction data (ICDD) file with card no 01-079-1396 and 00-033-1002. The PL excitation spectra consists broad band in range 200-350 nm and maximum intensity observed at 313 nm and emission spectra consist broad in range 325-500 nm and maximum intensity observed at 381 nm. The TL glow curve of MCaPO4:Ce (M = Li, K) phosphors were consist overlapping peaks in temperature 50-350 °C and these peaks were deconvoluted by using peak fit software. The kinetic parameters such as activation energy, frequency factor and order of kinetic were calculated by using peak shape method. Also MCaPO4:Ce (M = Li, K) phosphors show excellent OSL response under β irradiation.