摘要
用脱氧剂非真空环境下、Ｓｔｏｃｋｂａｒｇｅｒ方法生长未掺和掺钆和铕的、浓度范围在０．１～０．２ｗｔ％的ＰｂＦ２：β晶体．本文报导Ｘ射线激发ＰｂＦ２：Ｇｄ晶体的Ｇｄ３＋发射．揭示了分别来自６Ｐ和６Ｉ多重态３１２．５和２７７．４ｎｍ发射带，而６Ｄ→８Ｓ发射被点阵再吸收．６Ｉ的发射强度低于６Ｐ，说明６Ｐ能级优先占据．室温下以Ｘ射线激发在３６８．９和８１４．５ｎｍ之间观察到１４条Ｅｕ３＋离子的荧光线，并指定这些立方Ｅｕ３＋位荧光线．其中，△Ｊ＝１磁偶极线非常强．ＰｂＦ２：０．２ｗｔ％Ｇｄ２Ｏ３的总的发射强度稍高于ＰｂＦ２：０．１ｗｔ％Ｇｄ２Ｏ３．但是，对于ＰｂＦ２：０．２ｗｔ％Ｅｕ２Ｏ３和ＰｂＦ２：０．１ｗｔ％Ｅｕ２Ｏ３，他们总的发射强度相近．
PbF2:β undoped and doped with gadolinium and europium in the 0.1～0.2wt% range were grown not in vacuum by the stockbarger process of used with deoxidant. The X-ray excited Cd3+ emissions of PbF2:Gd crystals are reported. Emission is observed from 6P and 6I, but 6D → 8S emission is reabsorbed by the lattice. 6IJ emission intensities observed are weak, indicating that the 6PJ levels are occupied preferentially. About fourteen fluorescence lines of the Eu3+ ion (cubic centre) have been observed and identified between 368.9 and 814.5nm under X-ray excitation at room temperature. The magnetic dipole lines, for which △J=1, are the most intense. The total emission intensity of PbF2:0.2wt%Gd2O3 is slight higher than that of PbF2:0.1wt% Gd2O3. But for PbF2:0.2wt% Eu2O3 and PbF2:0.1wt% Eu2O3, their total emission intensities are nearly the same.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第1期11-16,共6页
Journal of Inorganic Materials
基金
国家自然科学基金
关键词
晶体
X射线
发射光谱
铕
电磁量能器
PbF_2:Gd, Eu crystals, X-ray excited emission spectra
