Critical attenuation of sound in liquid-helium films at 9 GHz
- 1 January 1976
- journal article
- Published by EDP Sciences in Journal de Physique Lettres
- Vol. 37 (10) , 255-259
- https://doi.org/10.1051/jphyslet:019760037010025500
Abstract
We have measured the critical ultrasonic attenuation in superfluid helium films at 9 GHz. The critical exponent 0.65 ± 0.15 of the divergence of the attenuation in liquid helium is interpreted with dynamical scaling arguments. The temperature marking the onset of super-fluidity depends on the film thickness ; this effect is explained in terms of the Ginzburg-Pitaevsky conditionsKeywords
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