Investigation of effects on thermoluminescence response of different boric acid concentrations in borate based phosphors

The purpose of this study is to investigate the effects of different boric acid concentrations on thermally stimulated luminescence (TSL) response of thulium (Tm) rare earth ion doped lithium borate phosphors. Thulium rare earth doped lithium borate phosphors were synthesized by conventional high temperature solid-state method. The synthesis was carried out at a temperature 1150 °C and three different materials were synthesized using different amounts of boric acid concemtration. X-ray diffraction (XRD) analysis was performed to determine if the synthesized structures were formed. Thermally stimulated luminescence glow curves of the synthesized thulium doped lithium borate phosphors doped with 1 mol % Tm ions was carried out using Harshaw 3500 TLD reader. The TSL of the phospors were investigated after X ray, beta, UV irradiation. Since it is apparent that there are changes in the form of the glow curves and peak temperatures with not only different boric acid concentrations, but also with the type of excitation, a great deal of more investigation is required. Hence, this work is the start point of the investigations of the TSL properties of thulium doped lithium borate phosphors. The continuation of this study is to targeted examine the effects of boric acid concentration on photoluminescence and radioluminescence spectra of these phosphors.