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Propagating phonons in liquid 4He

Wyatt, A.F.G. and Lockerbie, N.A. and Sherlock, R.A. (1989) Propagating phonons in liquid 4He. Journal of Physics: Condensed Matter, 1 (22). pp. 3507-3522. ISSN 0953-8984

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Abstract

at T approximately=0.1 K is studied as a function of pressure input power and propagation distance. Using a superconducting tunnel junction detector it is found that a single injected pulse can form two propagating pulses at low pressures but only one at high pressures. It is shown that three-phonon scattering can explain this behaviour. At low pressures, one group of phonons propagates ballistically while another group consists of strongly interacting phonons which travel at the ultrasonic velocity.

Item type: Article
ID code: 17757
Keywords: quantum gases, liquids, solids, condensed matter, structural, mechanical, thermal, Physics, Materials Science(all), Condensed Matter Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 17 May 2010 11:40
    Last modified: 05 Sep 2014 00:36
    URI: http://strathprints.strath.ac.uk/id/eprint/17757

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