Jpn. J. Appl. Phys. 26 (1987) Supplement 26-3-1 pp. 297-298  |Previous Article| |Next Article|  |Table of Contents|
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Proc. 18th Int. Conf. Low Temperature Physics, Kyoto, 1987

Sound Attenuation in Liquid ⁴He Films at Low Temperatures

A. Isihara¹, C. I. Um², C. W. Chun², W. H. Kahng² and S. T. Choh³

The attenuation coefficient of first sound in liquid ⁴He films is evaluated microscopically for low temperatures where 3p processes are dominant. Near absolute zero, the attenuation coefficient varies as T³ in temperature for low frequencies. However, as the temperature is increased, significant deviations take place due to a quadratic correction term which is due to the anomalous character of the energy dispersion.

URL: http://jjap.jsap.jp/link?JJAPS/26S3/297/