Relaxation and dissipation processes in the phonon-impuriton system of concentrated superfluid mixture 3He in 4He

The effective thermal conductivity coefficient was measured in superfluid mixtures 3He in 4He with initial molar concentration 9.8% 3He in the temperature range 70-500 mK. New and earlier experimental data on effective thermal conductivity, shear viscosity, spin diffusion are analyzed within the framework of the phonon-impuriton kinetic theory of superfluid mixtures. It is shown that experimental results for all kinetic coefficients can be adequately described from unified position, if the corresponding impuriton-impuriton relaxation times are used as fitting parameters. In the complex hierarchy, the role of each relaxation processes is estimated as a function of temperature and concentration. It is found that three phonon processes essentially contribute to setting of the equilibrium state. The phonon-impuriton relaxation times are calculated by integrating over the phonon energy in the whole region where such processes are allowed