Abstract
The method of absorption spectrophotometric analysis is used to determine the relative and absolute content of impurity trivalent ions of the remaining REE (rare-earth elements) in YAG (Yttrium-aluminum garnet) single crystals. This method enables measuring the content of REE impurities in YAG single crystals using the peak intensities of the characteristic absorption lines of trivalent ions of these elements in the concentration range about 1.10/sup -3/-5 mass% with an accuracy of not worse than 20% and a sample thickness of -1 cm. The sensitivity with which many REE are determined can be raised by at least two orders of magnitude by using wide absorption bands, associated with the allowed interconfigurational transitions of the impurity ions. The values of the absorption coefficients of REE impurities in YAG crystals enable the determination of the absolute concentrations of these impurities, including situations when several REE are present simultaneously in one sample.
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