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Effective ~3He interactions in dilute ~3He-~4He mixtures

机译：稀释〜3He-〜4He混合物中有效的〜3He相互作用

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摘要

The effective interaction between ~3He quasiparticles in dilute liquid ~3He-~4He mixtures affects many of its physical properties. The interaction potential is determined here from the saturation solubility and osmotic pressure data reported recently. The interactions are examined consistently over the entire pressure range of liquid-helium mixtures at very low temperatures, that is, from 0 to 25.6 bar, where the solid phase appears. To reproduce all experimental data, it was necessary to include a concentration dependence in the potential. This dependence, however, turned out to be almost the opposite to what has been proposed earlier. The deduced potential can be used to calculate, among other things, an estimate for the superfluid transition temperature of ~3He-~4He mixtures. In addition, we also find values for some less well-established parameters for helium mixtures, such as the binding energy of a ~3He atom in superfluid ~4He.
机译：稀液〜3He-〜4He混合物中〜3He准粒子之间的有效相互作用会影响其许多物理性质。这里的相互作用电位由最近报道的饱和溶解度和渗透压数据确定。在非常低的温度（即出现固相的0至25.6巴）下，在液氦混合物的整个压力范围内一致地检查了相互作用。为了重现所有实验数据，有必要在电位中包括浓度依赖性。但是，这种依赖性几乎与之前提出的相反。推导的电势可用于计算〜3He-〜4He混合物的超流体转变温度的估计值。此外，我们还找到了一些不太完善的氦混合物参数值，例如超流体〜4He中〜3He原子的结合能。

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  • 来源
    《Physical review》 |2012年第13期|p.134529.1-134529.8|共8页
  • 作者

    J. Rysti; J. Tuoriniemi; A. Salmela;

  • 作者单位

    Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 AALTO, Finland;

    Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 AALTO, Finland;

    Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 AALTO, Finland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mixed systems; liquid 3He, 4He mixtures;

    机译：混合系统;液态3He;4He混合物;

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