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

Abstract

Ce 3+-doped oxide glasses containing high Gd 2 O 3 concentration are prepared and their transmission, emission and excitation spectra are measured. Dependence of spectroscopic properties on concentrations of Ce 2 O 3 and Gd 2 O 3 are analyzed. The results show that the UV cut-off wavelength and the emission peaks show red shift, and Stokes shift increases with Ce 2 O 3 and Gd 2 O 3 concentrations due to the increasing optical basicity of the glasses. The emission intensity decreases with increased Ce 2 O 3 and Gd 2 O 3 concentrations and showing the concentration quenching effect. The red shift of excitation peak is less when the Gd 2 O 3 concentration increases, indicating that the energy transfer from Gd 3+ to Ce 3+ takes place in the oxide glasses with high Gd 2 O 3 concentrations, and thus Gd 3+ ions sensitize the luminescence of Ce 3+ ions. The Ce 3+ doped oxide glasses with high Gd 2 O 3 concentrations will be a promising scintillator for applications in the high-energy physics and other fields.