Journal of Low Temperature Physics

, Volume 138, Issue 1–2, pp 25–30 | Cite as

Phonon-Impuriton Relaxation and Transport in 3He-4He Superfluid Solutions

  • V. Chagovets
  • T. Kalko
  • E. Rudavskii
  • G. Sheshin
  • A. Zadorozhko
  • K. Nemchenko
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The measurements of the effective thermal conductivity coefficient of a superfluid3He-4He mixture with initial concentration of 9.8% 3He are carried out in the temperature range 70 – 500 mK. The results obtained and the other experimental data available on effective thermal conductivity, shear viscosity, and spin diffusion are interpreted within the kinetic theory of phonon - impuriton system of superfluid solutions. It is shown that all experimental data can be explained by taking into account the following relaxation processes: longitudinal phonon relaxation, phonon scattering by impuriton, phonon absorption and emission by impuriton, and impuriton - impuriton interaction. The last process is characterized by different relaxation times for each transport phenomenon: transfer of mass, momentum, and nucleus spin. The impuriton - impuriton and phonon - impuriton relaxation times are estimated and the hierarchy of relaxation times in such system is established. The phonon longitudinal relaxation time in phonon diffusion process should be taken into account. The phonon and impuriton contributions to thermal conductivity, viscosity, and mass diffusion are estimated.

Keywords

Viscosity Thermal Conductivity Relaxation Time Shear Viscosity Relaxation Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • V. Chagovets
    • 1
  • T. Kalko
    • 1
  • E. Rudavskii
    • 1
  • G. Sheshin
    • 1
  • A. Zadorozhko
    • 1
  • K. Nemchenko
    • 2
  1. 1.B. Verkin Institute for Low Temperature Physics and Engineering National Academy of Science of UkraineKharkovUkraine
  2. 2.V. Karazin Kharkov National UniversityKharkovUkraine

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