Synthesis of Lu2O3-Ga2O3-SiO2 Glass as a New Glass Scintillator

We synthesized 20Lu 2 O 3 -30Ga 2 O 3 -50SiO 2 glasses doped with various concentrations of Sn using a floating zone furnace equipped with Xe arc lamps.The samples showed a luminescence band around 450 nm in both photoluminescence (PL) and scintillation spectra.The origin of the luminescence was ascribed to the T 1 -S 0 transition of Sn 2+ on the basis of the luminescence wavelength and PL decay time constant.The highest scintillation intensity and PL quantum yield were observed from the 1% Sn-doped sample.The afterglow level tended to decrease with increasing Sn doping, and the afterglow levels of the 1 and 3% Sn-doped samples were comparable to that of the conventional Tl-doped CsI scintillator.The optimal concentration of Sn for the glass was estimated to be 1%.