Abstract
EARLIER it was reported that laser action was obtained at 6111 Å with the sodium salt of europium-tetrakis benzoylacetonate (B4EuNa) (ref. 1). Spectroscopically, this is the best chelate now known for obtaining stimulated emission: its luminescence spectrum presents only one strong very sharp line, namely 6 Å, in solution at 77° K (ref. 2).
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References
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CROZET, P., MEYER, Y. Stimulated Emission with a Non-dissociated Europium β-Dicetonate. Nature 213, 1115–1116 (1967). https://doi.org/10.1038/2131115a0
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DOI: https://doi.org/10.1038/2131115a0
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