Molecular collisions and self-diffusion in liquids |
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Authors: | DE O'Reilly |
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Institution: | Argonne National Laboratory , Argonne, Illinois, 60439 |
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Abstract: | The velocity autocorrelation function and coefficient of self-diffusion are derived for a hard-sphere fluid. An earlier quasi-lattice model of self-diffusion in liquids is re-examined and a less restrictive expression for the self-diffusion coefficient is derived. The coefficient of self-diffusion of a light or heavy isotope in the normal liquid is considered both for hard spheres and in the quasi-lattice approximation. An experiment is proposed to clarify the nature of the isotope effect in self-diffusion. |
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