Three-phonon relaxation in isotropic and anisotropic phonon systems of liquid helium at different pressures

Автор(и)

  • I.N. Adamenko Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61077, Ukraine
  • Yu.A. Kitsenko Akhiezer Institute for Theoretical Physics National Scientific Center "Kharkov Institute of Physics and Technology" National Academy of Sciences of Ukraine 1 Academicheskaya St., Kharkov 61108, Ukraine
  • K.E. Nemchenko Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61077, Ukraine
  • V.A. Slipko Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61077, Ukraine
  • A.F.G. Wyatt School of Physics, University of Exeter, Exeter, EX4 4QL, UK

DOI:

https://doi.org/10.1063/1.1943527

Ключові слова:

PACS: 67.40.Db, 67.40.Fd, 67.90. z

Анотація

Starting from the kinetic equation for phonons in superfluid helium, expressions for the rates of three-phonon scattering in isotropic and anisotropic phonon systems were obtained for different pressures. These expressions are valid in the whole range of energies where three-phonon processes are allowed. Limiting cases were analysed and compared with the results of previous theoretical investigations. The obtained pressure and angular dependence of three phonon scattering rate allows one to explaine of the experimental data on interaction of phonon pulses.

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Опубліковано

2005-05-04

Як цитувати

(1)
Adamenko, I.; Kitsenko, Y.; Nemchenko, K.; Slipko, V.; Wyatt, A. Three-Phonon Relaxation in Isotropic and Anisotropic Phonon Systems of Liquid Helium at Different Pressures. Fiz. Nizk. Temp. 2005, 31, 607-619.

Номер

Том 31 № 6 (2005)

Розділ

Квантові рідини та квантові кристали

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