Three-Body Correlations in Simple Dense Fluids

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Abstract
Correlations between triples of molecules in simple fluids at thermodynamic equilibrium are studied through their contribution to the isothermal density derivative of the pair probability density. Explicit computations are performed to indicate the role of the triplet function in accounting for the structure of the density derivative of the radial distribution function. The results imply that contributions from triplet correlations are in general quite appreciable. Various consequences of the results are disscussed, and the procedure is examined in general as a method for studying correlations between triples of molecules in simple fluids.