Thermoluminescence studies of LiSrBO3:RE3+ (RE=Dy, Tb, Tm and Ce)

The polycrystalline samples of LiSrBO3:RE3+ were synthesized by high-temperature solid-state reaction. The influence of different rare earth dopants, i.e. Dy3+, Tb3+, Tm3+ and Ce3+, on thermoluminescence (TL) of LiSrBO3 phosphor was discussed. We also investigated some dosimetric characteristics of LiSrBO3:Tm3+. The effect of the concentration of Tm3+ on the TL intensity was investigated and the result of which showed that the optimum mole fraction of Tm3+ was 1%. The TL kinetic parameters of LiSrBO3:0.01Tm3+ were calculated by the computer glow curve deconvolution (CGCD) method. We also studied the three-dimensional (3D) TL emission spectrum of LiSrBO3:0.01Tm3+ under gamma-ray irradiation. The dose-response of LiSrBO3:0.01Tm3+ to γ-ray was linear in the range from 1 to 400 m Gy.