摘要
制备了掺铈硼酸盐、硅酸盐、磷酸盐和锗酸盐等玻璃样品，测试了激发光谱和发射光谱，结果表明，随着玻璃光碱度的增大，即从磷酸盐到锗酸盐，Ｍ３＋的激发峰值波长从 ２９０ｎｍ到３８０ｎｍ，发射峰值波长从３４９ｎｍ到４８０ｎｍ，表现出强烈的Ｎｅｐｈｅｌａｕｘｅｔｉｃ 效应，ＳｔｏｋｅＳ位移从５０ｎｍ到１００ｎｍ。较长的激发波长和发射波长有利于闪烁光在玻璃中的透过。较大的Ｓｔｏｋｅｓ位移可以减少发射光的自吸收。作为玻璃闪烁体的基质，建议硼硅酸盐、硅酸盐和锗酸盐玻璃是比较合适的，本文为研制高密度玻璃闪烁体打下基础。
In this paper cerium doped borat, silicate, phosphate and germanate glasses samples are prepared and their excitation and emission spectra are measured. It is shown that with increasing optical basicity, that is, from phosphate to germanate glasses, the excitation peak wavelength and emission peak wavelength varies form 290nm to 380nm, 349nm to 480nm, respectively, showing strong Nephelauxetic effect. The stokes shift varies from 50nm to 100nm. Longer emission wavelength is favorable for transmission of scintillation light through glass bases. Larger stokes shift is desirable for decreasing of re-absorption of emission. It is suggested that borate, silicate and germanate are better host for cerium doped scintillator.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2001年第2期198-199,202,共3页
Journal of Functional Materials
