New relaxation process in the phonon-impurity system in He3-He4 solutions
Adamenko I. N. , Rudavskii E. Ya. , Tsyganok V. I. , Chagovets V. K.
Acoustic measurements and a theoretical analysis reveal two steps in the relaxation to equilibrium in the phonon system when an impurity is present. The relaxation time is found to be an order of magnitude shorter than in the theory derived previously, resolving the previous discrepancy between theory and experiment.