Multiple scattering of second sound in superfluid He II--filled porous medium

Journal Article · Sat Sep 01 00:00:00 EDT 1984 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.30.2909· OSTI ID:6350543

Singer, D; Pasierb, F; Ruel, R; Kojima, H

Observations on the multiple scattering of second sound in five fused-glass-bead porous media saturated with superfluid helium are reported. Near the lambda point where attenuation is small, the measured index of refraction of second sound is in agreement with that of first sound in the same porous medium. Below 1.7 K, both the index of refraction and the attenuation of second sound increase as the temperature is lowered. The measured temperature dependence can be described by the effects of viscous drag between the normal fluid component and the walls of the porous medium.

• Research Organization: Serin Physics Laboratory, Rutgers University, Piscataway, New Jersey 08854
• OSTI ID: 6350543
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 30:5; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATTENUATION
DRAG
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
MULTIPLE SCATTERING
NUCLEI
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POROUS MATERIALS
QUANTUM FLUIDS
REFRACTIVITY
SATURATION
SCATTERING
SECOND SOUND
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VISCOSITY
WALL EFFECTS