Second sound in metastable and phase-separated sup 3 He- sup 4 He mixtures

Journal Article · Mon Sep 10 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.1368· OSTI ID:6314279

Bodensohn, J ^[1]; Leiderer, P ^[2]

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1. Institut fuer Physik, Johannes Gutenberg Universitaet, Mainz (Federal Republic of Germany)
2. Fakultaet fuer Physik, Universitaet Konstanz (Federal Republic of Germany)

Propagation of second sound has been used to study superfluid {sup 3}He-{sup 4}He mixtures quenched into nonequilibrium states inside the miscibility gap. From the results for the second-sound velocity we conclude that the superfluid density in the metastable state is well described by extrapolation from equilibrium values. The attenuation of the second-sound amplitude displays a sharp increase as nucleation sets in at the cloud point, and during the subsequent coarse-graining process it varies in proportion to the total surface area of the droplets.

• OSTI ID: 6314279
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:11; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLITUDES
ATTENUATION
DATA
DISPERSIONS
DROPLETS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FLUID INJECTION
HELIUM 3
HELIUM 4
HELIUM ISOTOPES
INFORMATION
IRREVERSIBLE PROCESSES
ISOTOPES
LIGHT NUCLEI
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
NUCLEI
NUMERICAL DATA
PARTICLES
SECOND SOUND
STABLE ISOTOPES
SUPERFLUIDITY
SURFACES
VELOCITY