Abstract
We outline a model for calculating the Knight shifts of 23Na and 7Li nuclei in liquid sodium-lithium alloys. The model used for the calculations is based on the “multiple-scattering” model (self-consistent scattered wave). Bearing in mind that there exists an uncertainty of about 5–10% in the values of the susceptibilities of sodium and lithium, the calculated values of the Knight shift of 23Na in bcc Na and fcc Na (0.159% and 0.185%, respectively) are in good agreement with the experimental values of the Knight shift at the melting point and at 400°C (0.116% and 0.121%, respectively). The calculated value of the Knight shift K of 7Li in fcc Li is somewhat larger than the experimentally determined Knight shift in pure Li at 400°C: 0.033% and 0.026%, respectively. The theoretical calculations of the relative change ΔK/K0 of the Knight shifts of sodium and lithium nuclei in NaLi alloys as a function of the atomic concentration CNa are in reasonable accordance with the experimentally known linearity between ΔK/K0 and CNa.
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