Abstract—A method for measuring the concentration of Cr³⁺ ions is considered in ruby single crystals (Al₂O₃ : Cr³⁺) using X-ray fluorescence analysis. The laboratory energy dispersive spectrometer was calibrated using the external standard method for quantitative measurements. In constructing the calibration dependence, we used a series of test samples of ruby crystals in which the concentration of Cr³⁺ ions was determined from the spectra of the long-wavelength U absorption band of ruby with a maximum in the region of 550 nm. The linear dependence of the X-ray fluorescence intensity on the concentration of chromium ions was obtained, which indicates the absence of matrix effects in the studied range of Cr³⁺ concentrations (from 0.01 to 0.8 wt %). The possibility of using the method for measuring the concentration of other activators in dielectric ionic crystals is noted.

中文翻译：

---

以X射线荧光法测量Al 2 O 3晶体中Cr离子的活化剂浓度为例

摘要—通过X射线荧光分析，考虑了一种用于测量红宝石单晶（Al ₂ O ₃  ：Cr ³⁺）中Cr ³⁺离子浓度的方法。使用外标方法对实验室能量色散光谱仪进行了校准，以进行定量测量。在建立校准依赖性时，我们使用了一系列红宝石晶体的测试样品，其中的Cr ³⁺根据红宝石的长波U吸收带的光谱确定离子，最大吸收峰在550 nm范围内。获得了X射线荧光强度与铬离子浓度的线性关系，这表明在研究的Cr ³⁺浓度范围（0.01至0.8 wt％）中没有基质效应。注意到使用该方法测量介电离子晶体中其他活化剂浓度的可能性。