Gd_2O_2S：Eu^（3＋）的荧光光谱及晶体场计算  

Luminescence Fine-Spectra and Crystal Field Calculation of Gd_2O_2S:Eu￣3+

作　　者：池元斌[1] 王立中[1] 刘慎薪[1] 王秋平[1] 

机构地区：[1]吉林大学原子分子物理所,超硬材料国家重点实验室,中国科学院长春物理研究所,哈尔滨师范大学物理系

出　　处：《吉林大学自然科学学报》1994年第2期44-50,共7页Acta Scientiarum Naturalium Universitatis Jilinensis

基　　金：国家自然科学基金

摘　　要：在２１５００ｃｍ￣（－１）～１１５００ｃｍ￣（－１）区间内测量了红色荧光粉Ｇｄ＿２Ｏ＿２Ｓ：Ｅｕ的室温（３００Ｋ）乃低温（７７Ｋ）荧光光谱，认定了Ｇｄ＿２Ｏ＿２Ｓ：Ｅｕ￣（３＋）７７Ｋ的１２２条谱线和３００Ｋ的９６条谱线的跃迁属性．利用￣７Ｆ＿Ｊ的实验能级并考虑到中间耦合和Ｊ混杂效应，对Ｇｄ＿２Ｏ＿２Ｓ中Ｅｕ￣（３＋）的晶体场进行了计算。得到了７７Ｋ及３００Ｋ时的６个晶体场专数及晶体中的７个“自由离子能量”专数。拟合计算的均方差不大于１１ｃｍ￣（－１），初步指认了￣７Ｆ＿Ｊ各斯塔克能级的对称属性。The fluorescence spectra of Eu￣3+ in the site having C_3v symmetry of polycrystallineGd_2O_2S: Eu￣3+ were recorded in the region 21 500 cm￣-1～11 500 cm￣-1 at room temperatureand liquid-nitrogen temperature, respectively. The measured 122 spectral lines at 77 K and the 96 spectral lines measured at 300 Kwere assigned. Taking advantage of the experement level scheme,the crystal field calcula-tion was performed for Eu￣3+ in Gd_2O_2S.In our culculation,the J-mixing and the intermedi-ate-coupling were considered.The six crystal-field parameters and the seven 'free ion energylevel' parameters were obtained. A rms diviation was not larger than 11 cm￣-1. The assign-ment of symmetry species for the crvstal-levels of of Eu￣3+ was made.

关 键 词：荧光光谱 晶体场 稀土硫氧化物 

分 类 号：O734[理学—晶体学]