BaFCl:Eu^(2+)的正电子湮没谱研究

POSITRON LIFETIME STUDY OF VACANCY DEFECTS IN BaFCl:Eu2+

利用正电子湮没谱研究了不同离子数（Ｆ）／离子数（Ｃｌ）比ＢａＦＣｌ：Ｅｕ２＋系列粉末样品．实验结果表明：当晶体中的离子数（Ｆ）／离子数（Ｃｌ）＜１时，可以有效地产生Ｆ离子空位缺陷，当离子数（Ｆ）／离子数（Ｃｌ）比值在０．９２附近的空位缺陷浓度最大．

In this paper, the positron annihilation spectra of BaFCl:Eu2+ were carried out The experimental results show that the vacant defects of F- ions may be effectively created in the BaFCl:Eu2+ compounds when the F/Cl ratio is less than 1 In addition, the best value of the F/Cl ratio is near 1