SPECTROSCOPIC PROPERTIES OF Ce3+-DOPED OXIDE GLASSES WITH HIGH Gd2O3 CONCENTRATIONS

Ce3+-doped oxide glasses containing high Gd2O3 concentration are prepared and their transmission, emission and excitation spectra are measured. Dependence of spectroscopic properties on concentrations of Ce2O3 and Gd2O3 are analyzed. The results show that the UV cut-off wavelength and the emission peaks show red shift, and Stokes shift increases with Ce2O3 and Gd2O3 concentrations due to the increasing optical basicity of the glasses. The emission intensity decreases with increased Ce2O3 and Gd2O3 concentrations and showing the concentration quenching effect. The red shift of excitation peak is less when the Gd2O3 concentration increases, indicating that the energy transfer from Gd3+ to Ce3+ takes place in the oxide glasses with high Gd2O3 concentrations, and thus Gd3+ ions sensitize the luminescence of Ce3+ ions. The Ce3+ doped oxide glasses with high Gd2O3 concentrations will be a promising scintillator for applications in the high-energy physics and other fields.