On theHe3—He4Equilibrium below theλ-Point

Abstract

Previous experiments attempting to establish the distribution of ${\mathrm{He}}^3$ between the liquid and vapor phases of ${\mathrm{He}}^4$, in the region below the $\lambda$-point, are discussed. It is pointed out that, because of the non-classical behavior of liquid helium II, customary methods of analysis fail. New measurements, using an entirely different kind of technique, are reported, and the results compared with prior determinations.