Abstract
The SiO2 nanoparticles have been extracted from clay by the sol-gel method and mixed with magnesium oxide. The MgOSiO2 was characterized by structural characterization using XRD, IR, and XRF. The thermoluminescence properties of the prepared sample were examined using an ultraviolet (UV) source of 254nm. The samples display two peaks at 203oC and 307oC for 0.1% SiO2 whereas for 0.7% SiO2, the two peaks appear at 236 °C and 357 °C. The general thermos-luminescent dosimetric characteristics of samples, such as the dose-response, signal fading as a function of storage time, and reproducibility, were also tested using the annealing condition at 400oC for 2 h. The dose-response was linear with UV energy in the range from 100 μJ/cm2 up to 7700µJ/cm2 for both concentrations. The coefficient of variation (CV) was found to be 2.3% for 0.1% and about 3.6% for 0.7%. The fading is about 66% in a period of up to 25 days for the 0.1% sample, and for 0.7%, the fading was approximately reduced to 57% of its original value in the same period of 25 days.