Abstract
For Fr in Hg an extremely small Knight shift has been found as compared to the shift known for an alkali metal host. It indicates an almost complete loss of the outer s-electron of the alkali atom Fr when embedded in liquid mercury. This may be understood as a consequence of the small ionization energy of the Fr atom in comparison with the large work function of mercury.
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Haas, H., Stenzel, C., Mahnke, H.E. et al. The Knight shift of francium in mercury. Hyperfine Interact 60, 675–678 (1990). https://doi.org/10.1007/BF02399843
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DOI: https://doi.org/10.1007/BF02399843