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Isotherms of helium at liquid helium temperatures

โœ Scribed by W.H. Keesom; W.K. Walstra

Publisher
Elsevier Science
Year
1940
Weight
283 KB
Volume
7
Category
Article
ISSN
0031-8914

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โœฆ Synopsis

The authors determined isotherms of helium at liquid helium temperatures, up to densities near those of the saturated vapour. Table II gives the virial coefficients. The second virial coefficient, B, is compared with the results of computations made by Massey and Bucking ham, by De Boer and Michelsandby

Gropper. The third virial coefficient, C, is found to be distinctly negative at and below the boiling point of helium. The experimental values seem to indicate that it will pass through zero between 4.3 and 4.4"K. Below 3.1"K it increases rapidly to large negative values.

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โœ V. Chopra; K.D. Chaudhuri ๐Ÿ“‚ Article ๐Ÿ“… 1981 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 450 KB

The number of laboratories in India equipped with a liquid helium facility has steadily increased to about twelve, and more liquifiers are expected to be installed in the near future. In this article the cryogenic research works being carried out at various institutions are reviewed. Although the ou