Abstract
BeO has three well-known electronic states—all singlets. These are in order, the normal 1?+, then the two activated states 1?*+ and 1II. The ?* – ? bands1,2 lie in the visible region, the II – ? bands3 in the infra-red. There are also bands in the ultra-violet1,4, but the analyses of them are questionable.
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LAGERQVIST, A. Perturbations in the Band Spectrum of Beryllium Oxide. Nature 157, 547 (1946). https://doi.org/10.1038/157547b0
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DOI: https://doi.org/10.1038/157547b0
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