Ce^(3+)激活锂-6闪烁玻璃XPS能谱研究

XPS study of lithium-6 glass scintillator activated by Ce^(3+)

采用XPS能谱分析了不同熔制气氛下制备的锂-6玻璃闪烁体表面结构与Ce离子价态变化情况,研究结果表明锂-6玻璃闪烁体中,激活剂离子Ce3+未进入到玻璃网络结构中,以填充离子的形式分布在网络间隙中;O离子在锂-6玻璃闪烁体中以桥氧和非桥氧两种形式存在,而且随着玻璃配合料中还原剂C粉的掺量增加,非桥氧数量减少;采用XPS半定量计算出不同熔制气氛下锂-6玻璃闪烁体中Ce3+与Ce4+相对含量,为进一步优化其制备工艺技术提供了重要的理论参考依据。

Surface structure and valence state of Ce ion changes on lithium-6 glass scintillator which melted in different reducing atmosphere were studied by XPS,results show that Ce3＋ activator wasn＇t in glass network structure but distribute in network gap;oxygen ion exist in bridging oxygen and non-bridging oxygen forms,and the number of non-bridging oxygen reduced as reducing atmosphere enhanced;relative content of Ce3＋ and Ce4＋ could be calculated semi-quantitatively by XPS,it can provide important theoretical reference to further optimize the preparation of lithium-6 glass scintillator.