稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2004年
3期
361-364
,共4页
赫泓%于英宁%梁宏斌%王淑彬%苏锵%陶冶
赫泓%于英寧%樑宏斌%王淑彬%囌鏘%陶冶
혁홍%우영저%량굉빈%왕숙빈%소장%도야
chemical analysis%high resolution spectrum%borate%Eu3+ ion%rare earths
Excitation and emission spectra of new borate La2CaB10O19 doped Eu3+ in VUV-VIS range, high resolution emission spectra at room temperature and lifetime of Eu3+ were investigated. The emission line at about 616 nm attributed to the 5D0-7F2 transition of Eu3+ is the most intense emission of Eu3+. The broad band at about 244 nm is originated from charge transition band (CTB) of O2-→Eu3+. According to the numbers of spectral lines 5D0-7F0 and 5D0-7F1 in high-resolution spectrum, Eu3+ ions occupy two crystallographic sites. The lifetimes of 5D0-7F0 transition of Eu3+ of two kinds of lattice sites are individually 2.1 and 2.6 ms, and both are exponential decay. In the VUV excitation spectrum, complicated band between 130 and 170 nm consists of host absorption and f-d transition of Eu3+.
