Optical and scintillation properties of Gd2O2S: Pr, Ce, F ceramics fabricated by spark plasma sintering

摘要

Gd2O2S: Pr, Ce, F scintillation ceramics were fabricated by the spark plasma sintering (SPS) method. Optical absorption, phase evolution, luminescence spectra, and microstructures are investigated. Temperature dependent radio-luminescence under X-ray excitation has been performed in the 77-500 K range on Gd2O2S: Pr, Ce, F ceramics. The intensity of the X-ray emission peaks decreases with increase of the temperature from 250 K to 450 K. The effect of the sintering temperature on the light yield of Gd2O2S: Pr, Ce, F ceramics is also discussed, and the highest light yield reaches to 84% of that of the commercial sample. Some traps are proposed to be the main reason for degradation of the scintillation properties. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.