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Experiments on 3He–4He Mixtures in Aerogel

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Abstract

We describe experiments on 3He-4He mixtures in 98% open aerogel grown by cold-deposition (T≤80mK) of 4He followed by the deposition of 3He or alternatively by cooling down a homogenous mixture. The two approaches led to different 4He film morphologies. We will also describe the observation of migration of 4He from or toward the cell below 100 mK. This migration can lead to the exclusion of 4He (other than the localized surface layers) for4He concentrations between 4% and 11% in the cell.

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Authors and Affiliations

  1. Laboratory of Atomic & Solid State Physics, Cornell University, Ithaca, NY, 14853, USA

    W. J. McRae, G. Lawes, E. N. Smith & J. M. Parpia

  2. Dept. of Physics and Astronomy, Univ. of Manchester, Manchester, M13 9PL, UK

    A. Golov

  3. Dept. of Physics and Astronomy, Univ. of Delaware, Newark, DE, 19716, USA

    N. Mulders

Authors
  1. W. J. McRae
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  2. G. Lawes
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  3. A. Golov
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  4. E. N. Smith
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  5. N. Mulders
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  6. J. M. Parpia
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McRae, W.J., Lawes, G., Golov, A. et al. Experiments on 3He–4He Mixtures in Aerogel. Journal of Low Temperature Physics 121, 579–584 (2000). https://doi.org/10.1023/A:1017559310117

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  • DOI: https://doi.org/10.1023/A:1017559310117

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