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Thermometry using the osmotic pressure of mixtures of He3 in superfluid He4

โœ Scribed by R.L. Rosenbaum; Y. Eckstein; J. Landau

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
371 KB
Volume
14
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

Recent measurements of the osmotic pressure of mixtures of He 3 in superfluid He 4 demonstrate the feasibility of temperature measurement using either of two experimental techniques. The first method, developed by H. London, measures the osmotic pressure of the saturated mixture and is useful for thermometry down to 30 mK. The second method, discussed in this paper, uses very dilute mixtures and is useful down to 10 mK.

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โœ T. Takada; M. Okaji; J. Yuyama; H. Suzuki; T. Watanabe ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 470 KB

An apparatus for simultaneous measurements of heat capacities and pressure coefficients was designed and constructed for experimental studies of critical phenomena near the lambda points of liquid He 4 and He 3 -He 4 mixtures. The pressure was measured with a capacitance pressure sensor involving a