Second-sound absorption and dissipative processes in superfluid He3–He4 solutions
L. S. DikinaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRG. Ya. KotenevPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRÉ. Ya. Rudavskiı̆Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
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Second-sound absorption was measured in superfluid He3–He4 solutions with an He3 content up to 10% over the temperature range 1.3–2.0 °K. The experimental data obtained were analyzed within the framework of hydrodynamic theory. It is shown that in weak solutions, just as in He4, the major contribution to second-sound absorption is produced by thermal conductivity. With increase in concentration its effect becomes smaller than that of first viscosity and diffusion.
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