Effect of cerium on luminescence and irradiation resistance of Tb~(3+) doped silicate glasses

摘要

The effect of cerium addition on luminescence and irradiation resistance of Tb~(3+)doped silicate glasses was investigated. Results showed that Tb~(3+) doped silicate glasses mainly emit weak blue (400-460 nm) and strong green (480-570 nm) fluorescences. Cerium addition has a significant effect on the luminescence of Tb~(3+) doped silicate glasses. Both the luminescent intensity at 550 nm and the afterglow life quickly decreases with the increasing of CeO_2 concentration. However, irradiation resistance of Tb~(3+) doped silicate glasses can be effectively improved by CeO_2 addition because the valence change reaction: Ce~(3+)-e <-> Ce~(4+) takes place during irradiation.