Eu~(2+)4f~7组态内f→f跃迁发射有可能实现激光振荡,Eu~(2+)激活并可产生锐峰发射的若干晶体,储能高、阈值低,是有前景的短波可见固体激光材料的后备物。 Eu~(2+)实现f→f跃迁发射的条件是4f~65d吸收下限位于~6P_l能级之上。符合这一条件的基质化合物必须满足若干结晶学和光谱学条件。为此,许多作者从不同角度建立了相关的判 The f → f transition emission in the Eu ~ (2 +) 4f ~ 7 configuration is likely to result in laser oscillation, activation of Eu ~ (2+) and the generation of several crystals emitting sharp peaks with high energy storage and low threshold, which is promising Shortwave visible solid laser material backup. The condition for Eu ~ (2+) to achieve f → f transition emission is that the lower absorption limit of 4f ~ 65d is above ~ 6P_l level. The matrix compounds that meet this condition must satisfy a number of crystallographic and spectroscopic conditions. For this reason, many authors have established relevant judgments from different angles