摘要
采用高温熔融法制备了Tb单掺和Ce/Tb共掺硅酸盐闪烁玻璃,并测试样品的密度和荧光光谱.结果表明：玻璃样品具有较大的密度,均超过4.0 g/cm3.在空气氛围下熔制的Ce/Tb共掺硅酸盐玻璃中同时存在Ce3＋和Ce4＋离子.Ce3＋在激发波长为290~380 nm时,通过无辐射能量传递强烈敏化Tb3＋的发光;而Ce4＋则在不同波段激发光的激发下分别与Tb3＋和Ce3＋存在竞争吸收,因此随着Ce O2含量的增多Tb3＋的发光强度减弱.
The silicate scintillating glasses doped with Tb3 ＋and co-doped with Ce-Tb were synthesized by hightemperature melting method. The densities and fluorescence spectra of samples were investigated. The results showed that the density of glass samples was larger and more than 4. 0 g / cm3. Ce3 ＋and Ce4 ＋ions coexist in CeTb co-doped silicate glasses fabricated at air atmosphere. The luminescent sensitization of Tb3 ＋by Ce3 ＋was observed when excitation wavelength located at 290 ~ 380 nm,which was explained with non-radiation energy transfer from Ce3 ＋to Tb3 ＋. However,there was a competitive absorption between Ce4 ＋and Tb3 ＋/ Ce3 ＋respectively at different excitation wavelengths. The luminescent intensity of Tb3 ＋decreased as the concentration of Ce O2 increased.
出处
《吉林师范大学学报（自然科学版）》
2015年第1期23-26,共4页
Journal of Jilin Normal University:Natural Science Edition
基金
国家自然科学基金项目(11075026)
