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First sound measurements in liquid helium

✍ Scribed by A. Van Itterbeek; G. Forrez


Publisher
Elsevier Science
Year
1954
Weight
242 KB
Volume
20
Category
Article
ISSN
0031-8914

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We extend the functional form of thermodynamic velocity of first sound in liquid helium near X transition, at different pressures, by using the heat capacity (as proposed by Chase[l], Pippard[2] and G. Ahlers[3]) to reach the hydrodynamic region ( I t [ = [ T-TΓ— [ > 10 mK). For heat capacity we use