The luminescence spectrum of europium tris-hexafluoroacetylacetonate in various solutions is presented. While the presence of moisture has a marked effect on the spectral appearance of luminescence near 6100 Å, it does not appear to influence the long-lived phosphorescence near 4500 Å. The presence of this blue phosphorescence poses some questions regarding the rates of various energy-transfer processes.
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Halverson et al. (1964) studied this question.
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