Phonon-roton scattering and kinetic coefficients in helium II

Journal Article · Fri Apr 01 04:00:00 EST 1983 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00683416· OSTI ID:6083329

Khalatnikov, I M; Matveev, Y A

Significant factors in the scattering of an energetic phonon by a roton are the inelasticity of the process and the form of the dispersion curve E(P) for rotons, and these factors should be taken into account. We propose a simple method for calculating the scattering cross section based on a dependence E(P) outside the framework of the standard parabolic Landau approximation. The scattering cross section for this process and the phonon contributions to the viscoity and thermal conductivity coefficients are found. The expressions are in good agreement with experiment, without the use of any adjustable parameters.

• Research Organization: L. D. Landau Institute for Theoretical Physics, USSR Academy of Sciences, Moscow, USSR
• OSTI ID: 6083329
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 51:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
CROSS SECTIONS
DISPERSION RELATIONS
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
INELASTIC SCATTERING
ISOTOPES
LIGHT NUCLEI
NUCLEI
PHONONS
PHYSICAL PROPERTIES
QUANTUM FLUIDS
QUASI PARTICLES
ROTONS
SCATTERING
STABLE ISOTOPES
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VISCOSITY