• KIEE International Transactions on Electrophysics and Applications
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• v.11C no.4
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• pp.138-141
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• 2001

The fluorescence emission spectrum of Cr$^{3+}$ doped BeAl$_{6}$ O$_{10}$ crystals at 300 K contains a broad band, three R-like lines and another emission lines. It has been identified by a lifetime resolution spectroscopic technique that there are three kinds of single-Cr$^{3+}$ centers, Cr(I), Cr(II), Cr(III), in this crystal. Cr(I) and Cr(II) are high-crystal field centers responsible for the three main "R-lines", and Cr(III) is a low-crystal field center responsible for the main broad band emission. The structures of these luminescent centers are reported.ted.