Abstract
FROM extrapolation of X-ray data, it is known that the electrons in the N1 (and N2) shell of the ions of the rare earths possess less energy than those in the 0 shells. Expressed in terms of the Bohr-Stoner scheme, the electrons in the 44 shell are held less tightly than those of the 51 or 52, etc., shells. According to that scheme the electrons are arranged in the following manner:
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FREED, S., SPEDDING, F. Line Absorption Spectra in Solids at Low Temperatures in the Visible and Ultra-violet Regions of the Spectrum. Nature 123, 525–526 (1929). https://doi.org/10.1038/123525b0
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DOI: https://doi.org/10.1038/123525b0
