Quasi-diffusion between phonon and roton gases in two- and three-dimensional liquid helium

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00682109· OSTI ID:6513378

Um, Chungin; Jun, Chulwon ^[1]; Shin, Hyunjoon ^[2]; George, T F ^[3]

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1. Korea Univ. Seoul (Korea)
2. Research Institute of Industrial Science and Technology, Kyoungbuk (Korea)
3. State Univ. of New York, Buffalo (USA)

Temperature variations of the quasi-diffusion constant and thermal diffusion ratio between phonon and roton gases in two- and three-dimensional liquid helium are evaluated explicitly through the scattering of phonons by rotons. The diffusion constants in both dimensions decrease exponentially over the whole temperature range, while the thermal diffusion ratios increase and then decrease as temperature increases in the range from {approximately}0.6 to {approximately}1.1 K.

• OSTI ID: 6513378
• Journal Information: Journal of Low Temperature Physics; (USA), Journal Name: Journal of Low Temperature Physics; (USA) Vol. 78:1-2; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
DATA ANALYSIS
DIFFUSION
ELEMENTS
FLUIDS
GASES
HELIUM
LIQUIDS
NONMETALS
PHONONS
QUASI PARTICLES
RARE GASES
ROTONS
SUPERFLUIDITY
ULTRALOW TEMPERATURE