SUPERFLUIDITY OF A DILUTE HE-3-HE-4 SOLUTION - TAKING INTO ACCOUNT THE EFFECT OF BACKFLOW OF HE-3 BY HE-4

The interaction between two He-3 atoms is calculated by taking into ac count the backflow effect of He-3 by the He-4 in the He-3-He-4 mixture . The effect contributes solely to the P wave part of the interaction. The repulsive S wave part of the contact interaction contributes to t he exchange interaction between the He-3 atoms, while the direct one p honon exchange interaction contributes both to the S and P wave attrac tive interactions. The overall contribution to the attractive interact ion is dominated by the P wave part and the superfluidity in the P wav e is more predominant than in the S wave for the 5 % dilute He-3-He-4 solution, and vice versa for the 1.3 % solution.