Abstract
The results of conduction-electron-spin-resonance (CESR) measurements on liquid sodium-potassium alloys over the whole range of concentrations are presented. The experimental results are compared with the predictions of the theory proposed in Paper I, and with those of other theories which are valid in the low-concentration limit only. The possible errors introduced by using theoretical hard-sphere structure factors in the calculation are estimated. The relaxation time (RT) derived from the CESR linewidth exceeds the theoretical spin-lattice RT by a factor \ensuremath{\cong}1.85 for all concentrations. This difference is attributed to the exchange enhancement of the conduction-electron spin lifetimes. An upper bound for the exchange-enhancement factor $\ensuremath{\kappa}_{0}^{}{}_{}{}^{2}$ is determined. The theory in I may also be used to calculate the contribution of vacancies to the spin relaxation of the pure metal. The results show that this effect is negligible at equilibrium vacancy concentrations.
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