Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
On the suprathermal distribution in an anisotropic phonon system in He II
Репозиторій DSpace/Manakin
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On the suprathermal distribution in an anisotropic phonon system in He II
Тема:
Квантовые жидкости и квантовые кpисталлы
Інший ID:
PACS: 67.40.Db, 67.40.Fd
Посилання:
On the suprathermal distribution in an anisotropic phonon system in He II / I.N. Adamenko, K.E. Nemchenko, A.F. G. Wyatt // Физика низких температур. — 2003. — Т. 29, № 1. — С. 16-21. — Бібліогр.: 28 назв. — англ.
Підтримка:
We express our gratitude to EPSRC of the UK (grant GR/N18796 and GR/N20225), and to GFFI of Ukraine (grant N02.07/000372) for support for this work.
Дата:
2003
Переглядів:
707
Завантажень:
373
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.
