Abstract

A concentration series of Ca_(1 − X)Sr_XF₂:4 mol % YbF₃ crystals with Х varying from 0 to 1 has been grown. The absorption spectra of Yb³⁺ ions in these crystals are measured at temperatures of 300 and 77 K. It is shown that the intensity ratio of the absorption lines of clusters and tetragonal centers in the congruent crystals is higher than that in the other CaF₂–SrF₂ solid solution crystals. Analysis of the absorption profiles of Yb³⁺ optical centers in the concentration series of the solid solution crystals shows that it is energetically favorable for the Sr²⁺ ion to enter the local environment of both the tetragonal center and the cluster.

中文翻译：

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CaF 2 –SrF 2 –YbF 3氟化物固溶晶体中Yb 3+光学中心的研究

摘要

将系列浓度的Ca _{（1 -  X）}的Sr _X ˚F ₂：4摩尔％为YbF _3个晶体Х变从0到1已经生长。在300和77 K的温度下测量了这些晶体中Yb ³⁺离子的吸收光谱。结果表明，全同晶体中簇和四方中心吸收线的强度比高于其他CaF _2。 –SrF ₂固溶体晶体。对固溶体晶体浓度系列中Yb ³⁺光学中心的吸收谱分析表明，它对Sr ²⁺具有积极的作用 离子进入四边形中心和簇的局部环境。