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- W2019839395 abstract "The heat evolved when ${mathrm{He}}^{3}$ is added to liquid ${mathrm{He}}^{3}$-${mathrm{He}}^{4}$ mixtures at the saturated vapor pressure has been measured for temperatures in the region of 0.05ifmmode^circelsetextdegreefi{} K. The starting concentrations varied between zero and six atomic percent of ${mathrm{He}}^{3}$. Since the variation of the energy with temperature (the specific heat) is known, the experiments give the ground-state energy and the ${mathrm{He}}^{3}$ and ${mathrm{He}}^{4}$ chemical potentials at 0ifmmode^circelsetextdegreefi{} K as a function of concentration. The measurements were made in a calorimeter connected by a wire of high thermal resistance to a dilution refrigerator operating at ensuremath{sim}0.02ifmmode^circelsetextdegreefi{} K. The ${mathrm{He}}^{3}$ was added through a long tube containing thermal anchors connected to the refrigerator.The results give the difference in binding energy for one ${mathrm{He}}^{3}$ atom in ${mathrm{He}}^{4}$ relative to pure ${mathrm{He}}^{3}$ as $frac{({E}_{3}ensuremath{-}{{L}_{3}}^{0})}{{k}_{B}}=(0.312ifmmodepmelsetextpmfi{}0.007)$ deg K, in excellent agreement with the theoretical value of Massey and Woo. The concentration dependence of the energy and chemical potentials agrees with predictions using the Bardeen, Baym, and Pines empirical interaction. The osmotic pressure in a saturated solution at 0ifmmode^circelsetextdegreefi{} K is found to be (17.8 ifmmodepmelsetextpmfi{} 0.9) mm Hg." @default.
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- W2019839395 title "Heat of Mixing and Ground-State Energy of Liquid<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>He</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>He</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:…" @default.
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- W2019839395 doi "https://doi.org/10.1103/physrev.181.415" @default.
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