On the suprathermal distribution in an anisotropic phonon system in He II

Автор(и)

  • I. N. Adamenko V. N. Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61077, Ukraine
  • K. E. Nemchenko V. N. 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 (Low Temperature Physics):


https://doi.org/10.1063/1.1542372

Ключові слова:

PACS: 67.40.Db, 67.40.Fd

Анотація

The equation that describes the suprathermal distribution of high-energy phonons (h phonons) created in anisotropic phonon systems in superfluid helium is obtained. The solution of this equation enables the derivation of the value of suprathermal ratio S as the ratio of the actual distribution to the Bose-Einstein one, its dependences on the momentum of the h phonons, the anisotropy parameters, and the temperature of the low-energy phonons from which the h phonons are created. We analyze this equation to obtain an estimate of the value of the ratio between the h-phonon number density in anisotropic and isotropic phonon systems and draw conclusions about the dependence of S on the relevant parameters.

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Опубліковано

2002-11-29

Як цитувати

(1)
I. N. Adamenko, K. E. Nemchenko, and A. F. G. Wyatt, On the suprathermal distribution in an anisotropic phonon system in He II, Low Temp. Phys. 29, (2002) [Fiz. Nizk. Temp. 29, 16-21, (2002)] DOI: https://doi.org/10.1063/1.1542372.

Номер

Том 29 № 1 (2003)

Розділ

Квантові рідини та квантові кристали

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