Thermal transport in very dilute mixtures of /sup 3/He in /sup 4/He near the superfluid transition
We report measurements of the temperature difference across layers of liquid /sup 3/He-/sup 4/He mixtures in the superfluid phase as produced by a heat current at temperatures very close to T/sub lambda/(X). Here X is the /sup 3/He molar concentration that covers the range 2 x 10/sup -9/<2 x 10/sup -2/. The results are analyzed in terms of contributions from the boundary and the bulk fluid resistivities R/sub K/ and kappa/sub eff//sup -1/(X). Assuming R/sub K/(X) to be independent of X, we find that for X<10/sup -3/ there is a systematic departure from the prediction kappa/sub eff/proportionalX/sup -1/. The thermal relaxation times are consistent with this observation. An alternative analysis invoking an anomalous boundary resistance is presented.
- Research Organization:
- Department of Physics, Duke University, Durham, North Carolina 27706
- OSTI ID:
- 5601243
- Journal Information:
- Phys. Rev. Lett.; (United States), Vol. 54:21
- Country of Publication:
- United States
- Language:
- English
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Thermal transport in very dilute /sup 3/He-/sup 4/He mixtures near the superfluid transition
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 3
TEMPERATURE GRADIENTS
HELIUM 4
MIXTURES
CRITICAL TEMPERATURE
EXPERIMENTAL DATA
LAYERS
RELAXATION
SUPERFLUIDITY
THERMAL BOUNDARY RESISTANCE
DATA
DISPERSIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
NUCLEI
NUMERICAL DATA
PHYSICAL PROPERTIES
STABLE ISOTOPES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
640450* - Fluid Physics- Superfluidity