Low Temperature Physics: 39, 756 (2013); https://doi.org/10.1063/1.4821756
Fizika Nizkikh Temperatur: Volume 39, Number 9 (September 2013), p. 975-985    ( to contents , go back )

Phonon transformation at the superfluid helium–solid interface

I.N. Adamenko and E.K. Nemchenko

V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61022, Ukraine
E-mail: i.n.adamenko@mail.ru
pos Анотація:

Received March 4, 2013

Abstract

The Hamiltonian that describes the interaction of superfluid helium phonons with oscillating surface of the solid is obtained. This allows us to calculate the probabilities of both elastic and all inelastic processes of phonon transformation at the superfluid helium–solid interface. The contributions to heat flow between superfluid helium and solid due to all the processes are calculated. The results are compared with the experimental data and the results obtained by other authors.

PACS: 67.25.dt Sound and excitations.

Key words: Kapitza gap, phonons, heat flow.

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