Study of the gamma radiation response of watch glasses

Abstract

Some dosimetric properties of watch glasses were studied applying the thermoluminescence technique. The watch glass samples were powdered, and the selected grains were mixed with TeflonTM. The mixture was pressed and sintered to produce pellets of watch glass-TeflonTM composites. The glow curves of the pellets show two peaks at 130 and 195 {ring operator} C. Reproducibility of TL response was estimated to have a maximum coefficient of variation of 4.0%. The dose-response curve is sublinear between 0.5 and 20.0 kGy. The calibration curve is linear between 1.0 Gy and 1.0 kGy. The minimum detection limits were also determined. The gamma radiation dose response and the thermal stability of the materials were studied with the purpose to establish the best conditions of watch glasses for use in gamma radiation dosimetry.