The MgO-P2O5 glasses as thermoluminescent gamma dosimeters

The effect of gamma irradiation on thermoluminescence (TL) of the MgO-P2O5 glass system (10-60 mol% MgO) has been studied in the dose range from 2.5-120 Gy. The resulting TL emission spectra are characterized by a double peak at temperatures of about 90 degreesC and 300 degreesC depending on the MgO content and the gamma dose value. The intensity of the glow peaks was found to be dependent on gamma dose and MgO concentration. The prepared glass system was found to be insensitive to visible light and has thermally stable glow peaks which grew almost linear with the absorbed gamma dose up to a value of 120 Gy. The enhancement of TL intensity was found to be obtained at both low and high MgO concentration, but the high MgO content (i.e. greater than or equal to 50 mol% MgO) is preferable for better glass-stability conditions. Results are discussed within the framework of gamma interaction with glass specimens.