Synthesis and thermoluminescent characterization of synthetic hydroxyapatite as a detector for retrospective TL...

In the present work thermally stimulated luminescence from synthetic hydroxyapatite (SHA) under gamma, high energy electron beam (HEEB) and neutron (n) source were reported. The synthesis of SHA was carried out using the sol-gel method. Thermoluminescent (TL) glow curves of SHA powders were obtained by irradiation with Co-60 gamma radiation sources, high-energy electron beam and neutron-emitting source. The TL curve of HAS under the effect of gamma irradiation exhibited a TL glow curve with two well-defined peaks. The first one is located around 150 °C and the second one is located at 240 °C respectively. When irradiated with a high-energy electron beam, a peak centered at around 250 °C was observed. Meanwhile, when the samples were exposed to a neutron-emitting source, a prominent peak centered at 195 °C and two shoulders located at 245° and 290 °C respectively were observed. Other TL characteristics of SHA under gamma radiation effect were analyzed. Experimental results of SHA under three different ionizing radiation shows three different TL glow curves as well as other TL characteristics show also that SHA can be considered as potential candidate as radiation dosimeter in a retrospective dosimetry.