F／Cl比与Eu^（2＋）：BaFCl中F色心的浓度和光激励截面的关系

Dependence of Density and Photostimulated Cross Section ofF Color Centers in Eu￣(2+):BaFxCl2-xPhosphors on F/Cl Ratios

研究了Ｅｕ（２＋）：ＢａＦｘＣｌ２在紫外线辐照下的光激励发光。通过改变激励方式及激励光的扫描方向，给出了Ｅｕ（２＋）：ＢａＦｘＣｌ２－ｘ光激励发光过程中，两种Ｆ色心的浓度比值与光激励截面比值的测定方法。利用这种测定方法，进一步研究了两种Ｆ色心的浓度比值和光激励截面比值与Ｆ／ＣＩ比值的关系。

The photostimulated luminescence (PSL) of Eu2+: BaF.Cl2-x (x=0. 90,0. 95, 1. 00, 1. 05, 1. 10, 1. 15) phosphors under UV-irradiation is reported. Throughchanging the stimulated mode and scan direction of the stimulating light, the measurementmethod of the density ratios and photostimulated cross-section of the two kinds of F colorcenters during the PSL of Eu2+:BaF.Cl2-x phosphors are given. Utilizing this method, westudied further the dependence of the density ratios and phtotstimulated cross-section ratiosof the two kinds of F color centers on the F/Cl ratios.