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Significant Structure Theory Applied to Liquid 4He
Ryong Ryoo, Mu Shik Jhon and Henry Eyring
Proceedings of the National Academy of Sciences of the United States of America
Vol. 77, No. 1, [Part 1: Physical Sciences] (Jan., 1980), pp. 18-22
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/8282
Page Count: 5
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The large kinetic zero-point motion of 4He molecules has been properly taken into account in the significant structure theory of liquids in order to describe the liquidity of liquid 4He. The Debye and the Bose-Einstein partition functions are used for the solid-like molecules of the normal fluid component and for the whole gas-like molecules, respectively. The solid-like molecules of the superfluid component are considered as ground state molecules without having positional degeneracies. The Bragg-Williams approximation of an order/disorder phase transition has been applied to the λ transition of liquid 4He. Thermodynamic and surface properties of liquid 4He have been calculated up to the critical point. The results are satisfactory when compared with the observed values.
Proceedings of the National Academy of Sciences of the United States of America © 1980 National Academy of Sciences