An equilibrium isotope effect has been studied as a continous function of the potential field acting on the atom undergoing isotopic exchange. This has been accomplished through a study of the liquid vapor isotope fractionation factors for both /sup 36/Ar//sup 40/Ar and /sup 80/Kr//sup 84/Kr in a series of binary mixtures which span the range between the pure components at 117.5/sup 0/K. The /sup 36/Ar//sup 40/Ar fractionation factor increases (linearly) from (1n..cap alpha..) 2.49x10/sup -3/ in pure liquid argon to 2.91 x 10/sup -3/ in an infinitely dilute solution in liquid krypton. Conversely, the /sup 80/Kr//sup 84/Kr fractionation factor decreases …
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An equilibrium isotope effect has been studied as a continous function of the potential field acting on the atom undergoing isotopic exchange. This has been accomplished through a study of the liquid vapor isotope fractionation factors for both /sup 36/Ar//sup 40/Ar and /sup 80/Kr//sup 84/Kr in a series of binary mixtures which span the range between the pure components at 117.5/sup 0/K. The /sup 36/Ar//sup 40/Ar fractionation factor increases (linearly) from (1n..cap alpha..) 2.49x10/sup -3/ in pure liquid argon to 2.91 x 10/sup -3/ in an infinitely dilute solution in liquid krypton. Conversely, the /sup 80/Kr//sup 84/Kr fractionation factor decreases (linearly) from ln..cap alpha..) 0.98 x 10/sup -3/ in pure liquid krypton to 0.64x10/sup -3/ in an infinitely dilute solution in pure liquid argon. The mean force constants on both argon and krypton atoms in the mixtures are derived from the respective isotope fractionation factors. It is shown that the mean force constant on argon atoms in infinitely dilute solution in krypton is equal to the mean force constant on krypton atoms in infinitely dilute solution in argon. The mean force constants for argon and krypton as a function of composition have been calculated by a modified corresponding states theory which uses the pure liquids as input parameters.
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Lee, M. W.; Neufeld, P. & Bigeleisen, J.Liquid-vapor isotope fractionation factors in argon--krypton binary mixtures,
report,
January 1, 1977;
United States.
(https://digital.library.unt.edu/ark:/67531/metadc1446929/:
accessed July 16, 2024),
University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu;
crediting UNT Libraries Government Documents Department.