Journal of Low Temperature Physics

, Volume 37, Issue 5, pp 663–678

Surface tension sound in superfluid helium films adsorbed on alumina powder

  • R. Rosenbaum
  • G. A. Williams
  • D. Heckerman
  • J. Marcus
  • D. Scholler
  • J. Maynard
  • I. Rudnick
Article

DOI: 10.1007/BF00113877

Cite this article as:
Rosenbaum, R., Williams, G.A., Heckerman, D. et al. J Low Temp Phys (1979) 37: 663. doi:10.1007/BF00113877

Sound propagation has been studied in He II films adsorbed on alumina powder grains (Al2O3). Sound velocity and adsorption isotherm data provide evidence that surf ace tension forces can exceed the van der Waals forces as the film thickness increases. A model of capillary condensation at the points where the powder grains touch accounts for many of the qualitative features of the data. The surface tension sound velocity decreases with increasing powder grain size.

Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

  • R. Rosenbaum
    • 1
  • G. A. Williams
    • 1
  • D. Heckerman
    • 1
  • J. Marcus
    • 1
  • D. Scholler
    • 1
  • J. Maynard
    • 1
  • I. Rudnick
    • 1
  1. 1.Department of PhysicsUniversity of CaliforniaLos Angeles
  2. 2.Department of Physics and AstronomyTel-Aviv UniversityRamat-AvivIsrael
  3. 3.Physics DepartmentThe Pennsylvania State UniversityUniversity Park

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