Thermoluminescence properties of fly ash with divalent anion composite for high dose tl dosimetric application

Abstract

In this study, we have synthesized fly ash composite materials with a divalent anion. Thermoluminescence (TL) characteristics of fly ash composite materials were recorded after irradiation by 60Co gamma exposure. TL glow curve at around 203 °C was observed in case of divalent anion doped phosphor. Co-doping of divalent anion changes the TL peak positions by 2 to 10°C. TL dose response curve of fly ash composite was also recorded. The dosimetric TL peak was observed at high temperature and hence less fading of TL signal was recorded for twelve days of a storage period. The TL response of the fly ash composite may be considered to be satisfactory for applications in high dose dosimeters. TL trapping parameters, such as order of kinetics (b), activation energy (E), and frequency factor (s) associated with the most intensive glow peak of fly ash composite materials, were determined by using Chen's peak shape method and are reported in this paper.