Thermoluminescence studies of LiSrBO(3):RE(3+) (RE=Dy, Tb, Tm and Ce)

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