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Surface tension of liquid3He and4He near the liquid-gas critical point

Surface tension of liquid3He and4He near the liquid-gas critical point The surface tension of liquid3He and4He was measured near the gas-liquid critical points in the reduced temperature range 3×10−4<t<2×10−1, where t ≡ (T c −T)/T c . The critical exponents were found to be μ3=1.289±0.015 for3He and μ4=1.306±0.017 for4He. These values are very close to those for classical liquids, and are consistent with the value of 1.28 predicted by Widom, but are apparently different from the exponents previously obtained for liquid helium isotopes, which are near unity. The critical coefficients show good agreement with the quantum-corrected corresponding states theory for the Lennard-Jones 6–12 potential discussed by Young. The interface thickness is deduced from Widom's theory to bed=d 0t−v′ withd 30=0.14±0.03nm and v′3=0.57±0.04 for3He, andd 40=0.37±0.07 nm and v′4=0.58±0.01 for4He. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Surface tension of liquid3He and4He near the liquid-gas critical point

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References (27)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00681495
Publisher site
See Article on Publisher Site

Abstract

The surface tension of liquid3He and4He was measured near the gas-liquid critical points in the reduced temperature range 3×10−4<t<2×10−1, where t ≡ (T c −T)/T c . The critical exponents were found to be μ3=1.289±0.015 for3He and μ4=1.306±0.017 for4He. These values are very close to those for classical liquids, and are consistent with the value of 1.28 predicted by Widom, but are apparently different from the exponents previously obtained for liquid helium isotopes, which are near unity. The critical coefficients show good agreement with the quantum-corrected corresponding states theory for the Lennard-Jones 6–12 potential discussed by Young. The interface thickness is deduced from Widom's theory to bed=d 0t−v′ withd 30=0.14±0.03nm and v′3=0.57±0.04 for3He, andd 40=0.37±0.07 nm and v′4=0.58±0.01 for4He.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Nov 6, 2004

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