Gas-liquid Phase Transition in the System of Surface Impurities of 3He in Superfluid Solutions
Andreev A.F., Kompaneets D.A.
It is shown that a first-order phase transition should be observed on the free surface of an He3 solution in helium II. This transition is due to condensation of the surface impurities and is accompanied by a kink on the plot of the surface tension against the temperature.