Heat transport in dilute mixtures of3He in superfluid4He |
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Authors: | Daniel Murphy Horst Meyer |
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Affiliation: | (1) Department of Physics, Duke University, 27708-0305 Durham, North Carolina, USA |
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Abstract: | We report new measurements of the effective thermal conductivity Keff and relaxation time τ in dilute mixtures of3He in superfluid4He, with molar concentrationsX≤10−3. The temperature range extended fromT≈1.4 K toT
λ. Both Kcff and τ are found to agree with theoretical predictions, in contrast to previous experiments where significant differences
were observed. A new thermal conductivity cell design was used which almost completely eliminates extraneous volumes and surfaces,
and the earlier results are explained in relation to these design changes. |
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