Abstract
The thermal conductivity of helium I was measured along its vapor pressure curve over the range $3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}\ifmmode^\circ\else\textdegree\fi{}\mathrm{K}<T\ensuremath{-}{T}_{\ensuremath{\lambda}}<1\ifmmode^\circ\else\textdegree\fi{}\mathrm{K}$ using the parallel-plate technique. The exponent in a power-law variation of thermal diffusivity with $T\ensuremath{-}{T}_{\ensuremath{\lambda}}$ was found to depend on the plate spacing. These results could imply the existence of a relatively temperature-independent characteristic length in helium I near ${T}_{\ensuremath{\lambda}}$ approximately ${10}^{4}$ to ${10}^{5}$ times larger than the coherence length.
Keywords
ExponentThermal conductivityPhysicsThermal diffusivityLambdaHeliumAtomic physicsThermodynamicsOptics
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Publication Info
- Year
- 1968
- Type
- article
- Volume
- 21
- Issue
- 16
- Pages
- 1156-1158
- Citations
- 30
- Access
- Closed
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M. Archibald,
J. M. Mochel,
Loren Earl Weaver
(1968).
Size Dependence of the Thermal Conductivity of Helium I Near the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>λ</mml:mi></mml:math>Point.
Physical Review Letters
, 21
(16)
, 1156-1158.
https://doi.org/10.1103/physrevlett.21.1156
Identifiers
- DOI
- 10.1103/physrevlett.21.1156