Interpretation of the 4f-5d Excitation Spectra of Eu^(3+) and Tb^(3+) Doped in Crystals  

作　　者：夏上达 陈涛 段昌奎 

机构地区：[1]Institute of Modern Physics Chongqing University of Post and Telecommunications Chongqing 400065 China,Department of Physics University of Science and Technology of China Hefei 230026,China,Department of Physics,University of Science and Technology of China Hefei 230026,China,Institute of Modern Physics,Chongqing University of Post and Telecommunications Chongqing 400065 China,

出　　处：《Journal of Rare Earths》2006年第4期400-407,共8页稀土学报（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(10474092and10274079)andtheMinistryofEduca-tion,China(205133,KJ05O514)

摘　　要：The structure of the low-temperature 4f^N→4f^N-15d excitation spectra of Eu^3＋ and Tb^3＋ doped in crystals LiYF4, YPO4 and CaF2 measured by van Pieterson et al. in 2002 was analyzed and assigned based on the simple model proposed by Duan and co-workers in the last few years. Some complemental discussion on effects of J-mixing on the f-d transition intensities for Eu^3＋ due to the f-electron crystal-field interaction Hcf（f）, which was ignored in the simple mod- el, was presented. Some previously unexplained peaks for Tb^3 ＋ were interpreted to be spin-forbidden transitions to higher 5d crystal-field levels, or assigned to be f→d excitations with the core 4f7 excited from ^8S to ^6P, ^6I and ^6D, respectively. It is shown that the main structure of 4f-Sd excitation spectra of Eu^3＋ and Tb^3＋ can be well interpreted with the simple model.The structure of the low-temperature 4f^N→4f^N-15d excitation spectra of Eu^3＋ and Tb^3＋ doped in crystals LiYF4, YPO4 and CaF2 measured by van Pieterson et al. in 2002 was analyzed and assigned based on the simple model proposed by Duan and co-workers in the last few years. Some complemental discussion on effects of J-mixing on the f-d transition intensities for Eu^3＋ due to the f-electron crystal-field interaction Hcf（f）, which was ignored in the simple mod- el, was presented. Some previously unexplained peaks for Tb^3 ＋ were interpreted to be spin-forbidden transitions to higher 5d crystal-field levels, or assigned to be f→d excitations with the core 4f7 excited from ^8S to ^6P, ^6I and ^6D, respectively. It is shown that the main structure of 4f-Sd excitation spectra of Eu^3＋ and Tb^3＋ can be well interpreted with the simple model.

关 键 词：f-d transition the simple model energy levels transition intensities Eu^3＋ Tb^3＋ rare earths 

分 类 号：O433[机械工程—光学工程]