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Surface tension of liquid4He. Surface energy of the Bose-Einstein condensate

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Abstract

The surface tension of liquid4He was measured by means of surface-wave resonance, and the relative variation showed excellent agreement with that previously obtained by a precise capillary-rise method. The absolute value of the surface tension at absolute zero was measured as 354.4±0.5 mdyne/cm, 6% smaller than the previous value. The surface energy associated with the Bose-Einstein condensate wave function was found to dominate the surface tension in the superfluid phase. The condensate fraction other than in the vicinity of the λ point was estimated asn 0(0)-n 0(T)=A(T/T λ)α, withn 0(0)=0.125±0.025,A=0.177±0.047, and α=5.07±0.17.

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  1. Institute for Solid State Physics, University of Tokyo, Tokyo, Japan

    M. Iino, M. Suzuki & A. J. Ikushima

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  1. M. Iino
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  2. M. Suzuki
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  3. A. J. Ikushima
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Iino, M., Suzuki, M. & Ikushima, A.J. Surface tension of liquid4He. Surface energy of the Bose-Einstein condensate. J Low Temp Phys 61, 155–169 (1985). https://doi.org/10.1007/BF00682735

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  • DOI: https://doi.org/10.1007/BF00682735

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