Abstract
A SIMPLE rule based on atomic energy-levels rather than intervals has been found for those multiplets which approximate to LS-coupling. The results obtained using this rule are in better agreement with experimental results than either the Landé rule or the rule due to Araki1, which includes a correction for spin-spin interaction.
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References
Araki, G., Prog. Theor. Phys., 3, 152 (1948).
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RICHARDS, E., RIDGELEY, A. An Empirical Level Rule for Spectroscopic Terms approximating to LS-Coupling. Nature 203, 1277–1278 (1964). https://doi.org/10.1038/2031277a0
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DOI: https://doi.org/10.1038/2031277a0
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