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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Murphy, D., Meyer, H. Heat transport in dilute mixtures of3He in superfluid4He. J Low Temp Phys 107, 175–196 (1997). https://doi.org/10.1007/BF02396840
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DOI: https://doi.org/10.1007/BF02396840