Abstract
We report a study of the Leggett-Rice effect in dilute 3He-4He solutions at a Larmor frequency of 71 MHz. We have measured the height and phase of the spin echoes following 2-pulse NMR sequences of three solutions with 3He concentrations of 0.56%, 1.4%, and 4.0%. The theory of Leggett fits the data extremely well and yields values of the parameter ΜM0 and the transverse diffusion coefficient D. We are also able to evaluate ΜM0 and D by analyzing multiple spin echoes and find good consistency between the two methods. From values of λ/(1+F 0 a ) at various concentrations, we are able to determine the scattering length for 3He quasiparticles, a, quite accurately. We find a = −0.97±0.03 A.
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