Thermoluminescence characteristics of rare-earth-doped LiCaBO 3 phosphor

Abstract

LiCaBO 3 was 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 LiCaBO 3 phosphor was discussed. We studied the TL properties and some dosimetric characteristics of Ce 3+-activated LiCaBO 3 phosphor in detail. The effect of the concentration of Ce 3+ on TL was investigated, the result of which showed that the optimum Ce 3+ concentration was 1 mol%. The TL kinetic parameters of LiCaBO 3:0.01Ce 3+ were studied by computer glow curve deconvolution (CGCD) method. The three-dimensional (3D) TL emission spectra were also studied, peaking at 431 and 474 nm due to the characteristic transition of Ce 3+. We also studied the linearity, annealing condition, reproducibility, fading and different heating rate of the LiCaBO 3:0.01Ce 3+ phosphor.