Study on the influence of thermal treatments on the radio-luminescence in LiF:Mg,Cu,P (GR-200A)

Abstract

Radio-luminescence (RL) spectra of LiF:Mg,Cu,P (GR-200A) were recorded following various annealing treatments with heating temperatures from 240 to 700 °C, with re-annealing at 240 °C and with a combined re-annealing procedure of 20 min at 270 °C followed by 10 min at 240 °C. RL intensity, the position of the maximum RL intensity (λm) and RL spectrum were obviously dependent on the annealing temperature. The thermoluminescence (TL) intensity of the main peak of LiF: Mg, Cu, P can be partially restored, and the RL intensity can be basically increased by re-annealing at 240 °C. The effect of the combined re-annealing on RL is similar to the effect of 240 °C re-annealing, and the RL intensity of a sample with a combined re-annealing was basically less than that with re-annealing at 240 °C. The annealing of 700 °C + 240 °C can be used as an optimized annealing condition for RL measurement by LiF:Mg,Cu,P.