Thermoluminescence study of indium doped phosphate glass

Abstract

The phosphate glass doped with indium oxide was synthesized and studied for the influence of the dopant on thermoluminescence behavior. During studies, high doses of radiation were used (up to 35 kGy, β−). TL studies were investigated using various methods, such as direct measurements of TL response vs. radiation dose, TMax-Tstop method, and Computing Glow Curve Deconvolution (CGCD) method. It has been established, that doping phosphate glass with indium oxide with an amount of 0.5% (w/w) leads to a decrease of total thermoluminescence signals in comparison to native glass (sensitivity decrease ca. 5 times). On the other hand, using indium oxide leads to increasing the linearity range from 6.5 kGy (for native glass) up to 23.0 kGy. Data from signal loss in time and CGCD analysis indicates a reduction in signal loss over time and the formation of 7 defects with multiple kinetics. The collected data indicate the potential use of indium oxide as a dopant in ionizing radiation dosimeters based on phosphate glasses. Indium can potentially be an alternative to rare earth metals - the most commonly used dopants in phosphors.