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Abstract
It is pointed out that the spin lattice relaxation rate measured in a magnetic resonance experiment is twice the spin frequency calculated by Helman. Revised values of the spin lattice relaxation time in sodium are presented here and are in somewhat better agreement with experiment than previously. The effect of different structure factors on the relaxation time in liquid sodium and potassium is calculated. The relaxation time is underestimated, best agreement with experiment being obtained using the structure factor of Ashcroft and Lekner.