BaFBr，BaFBr：Eu^（2＋）和BaFBr：Ce^（3＋）晶体在X射线辐照和光激励过程中发光和光电导的实时原位测量  

MEASUREMENTS OF LUMINESCENCE AND ELECTRO-CON-DUCTIVITY OF BaFBr, BaFBr: Eu￣(2+) AND BaFBr: Ce￣(3+) SINGLE CRYSTALS IN SITU AND REAL TIME DURING X-IRRADIATION AND PHOTOSTIMULATION

作　　者：董翊[1] 苏勉曾[1] 

机构地区：[1]北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室

出　　处：《光谱学与光谱分析》1996年第3期14-17,共4页Spectroscopy and Spectral Analysis

基　　金：国家基础性研究重大项目;国家自然科学基金

摘　　要：在自建的多功能实时原位测量发光特性和光电导的实验装置上，测量了ＢａＦＢｒ，ＢａＦＢｒ：Ｅｕ２＋和ＢａＦＢｒ：Ｃｅ３＋单晶在Ｘ射线辐照和光激励过程中的发光强度和光电导。首次从光电导的角度测量到Ｘ射线辐照时，Ｅｕ２＋并没有被离化，而Ｃｅ３＋被离化，离化电子经导带被Ｆ＋心俘获；明确证实了光激励过程中Ｆ心电子的隧穿效应。With our home--made experimental equipment , luminescence and electro--conductivity of BaFBr: Eu2+ and BaFBr: Ce3+ single crystals were measured simultaneously in situ and real time during X--irradiation and photostimulation. During photostimulation not only in BaFBr: Eu2+ crystal but also in BaFBr: Ce3+ and BaFBr crystals electrons of F-- (X) centers transfer via tunneling to luminescent centers rather than through conduction band. Photostimulated conductivity has nothing to do with photostimulated lurninescence.

关 键 词：光激励发光 X射线 光电导 隧穿效应 晶体 

分 类 号：O734[理学—晶体学]