Pr3+对Ce3+掺杂高钆铝硼硅酸盐氟氧玻璃发光性能及能量传递机理OA

Scintillating glass,as a key material for high-energy radiation detection,shows significant application pros-pects in large-size,low-cost radiation detection systems.However,in high-Gd-content scintillating glasses,cross-relaxation among Gd3+ions limits energy transfer efficiency,thereby restricting further improvement of luminescence performance.In this study,a high-temperature melting method was employed to synthesize Pr3+and Ce3+co-doped gadolinium-rich boron-aluminosilicate oxyfluoride glass(Gd2O3-GdF3-B2O3-Al2O3-SiO2-CeO2,referred to as CS glass)under a reduc-ing atmosphere(CO).Using absorption,reflection,and luminescence spectroscopy,we systematically investigated the influence of Pr3+doping on the optical and scintillation properties of Ce3+-doped scintillating glass,along with the energy transfer mechanisms among Pr3+,Ce3+and Gd3+rare-earth ions.The fluorescence intensity of this glass under X-ray excitation was compared with that of BGO crystal.Results demonstrate that low-concentration Pr3+doping sig-nificantly enhances the luminescence intensity of CS glass excited at 275 nm,increasing the X-ray excited optical yield by 60%.A pronounced 5d-4f transition of Pr3+was observed in low-Pr3+-doped CS glass,accompanied by Pr3+→Gd3+→Ce3+and Gd3+→Pr3+energy transfer.In glasses with higher Pr3+concentrations,the 4f-4f transition of Pr3+dom-inates,while Gd3+→Pr3+energy transfer persists,resulting in prolonged fluorescence decay time for both Gd3+and Ce3+.