Hydrodynamics of rotons below 1 degreeK: Theory and experiments

Journal Article · Sat May 01 04:00:00 EDT 1976 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.13.3854· OSTI ID:7364148

Castaing, B

Using a heat-pulse technique the decoupling of phonons and rotons at low temperature in superfluid /sup 4/He under pressure (0--25 bar) is studied. It is shown that the phonons and the rotons behave as two independent fluids at low temperature. The line shapes, the time of flight, and the linewidths are in good agreement with our theory, using the Khalatnikov theory for the phonon-roton interaction and a dipole-dipole interaction between rotons. (AIP)

• Research Organization: Groupe de Physique des Solides de l'Ecole Normale Superieure, 24, rue Lhomond, 75231 Paris 5eme, France
• OSTI ID: 7364148
• Journal Information: Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 13:9; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FLUID MECHANICS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
HYDRODYNAMICS
ISOTOPES
KHALATNIKOV THEORY
LIGHT NUCLEI
MASSLESS PARTICLES
MECHANICS
NUCLEI
PHOTONS
PRESSURE DEPENDENCE
QUASI PARTICLES
ROTONS
STABLE ISOTOPES