Synthesis and TL/OSL properties of a novel high-sensitive blue-emitting LiSrPO4:Eu2+ phosphor for radiation dosimetry

In this study, a series of Eu 2+ -doped LiSrPO 4 phosphors were synthesized via solid-state method. The structural and morphological characterizations were done through X-ray diffraction and scanning electronic microscope. Additionally, the photoluminescence (PL), thermoluminescence (TL) and optically stimulated luminescence (OSL) behaviours of LiSrPO 4 :Eu 2+ phosphors were studied. The LiSrPO 4 :Eu 2+ phosphor shows OSL sensitivity about 8 times than that of α-Al 2 O 3 :C phosphor and 6 times than that of LiMgPO 4 :Tb 3+ , B phosphor. Moreover, TL sensitivity was about 15 times more as compared to α-Al 2 O 3 :C phosphor. The kinetic parameters of TL curve were calculated using peak shape method. In TL/OSL mode, dose–response was almost linear nature, in the range of measurement. The minimum detectable dose was found to be 25.18 μGy with 3 σ of background. Also, reusability was also studies, which shows the phosphor can be reusable for 10 cycles with 0.1 % change in OSL output.