APPLICATIONS OF THE PERTURBATIVE HYPERNETTED-CHAIN EQUATION TO THE ONE-COMPONENT PLASMA AND THE ONE-COMPONENT CHARGED HARD-SPHERE SYSTEMS

The perturbative hypernetted-chain (PHNC) equation developed recently has been applied to the one-component plasma (OCP) and the one-compone nt charged hard-sphere (OCCHS) systems in a uniform compensating backg round. Computed thermodynamic properties and pair correlation function s show that the PHNC gives excellent agreement with computer simulatio ns and that it is as accurate as (or, in some cases, superior to) the reference-hypernetted chain and the hypernetted-chain-mean spherical e quations, representing the two best currently available theories. The PHNC also predicts the OCP screening function at short range in close agreement with computer simulations and is superior to other theoretic al results. Reliability of the radial distribution function at the har d-sphere contact distance for the OCCHS is also discussed. (C) 1995 Am erican Institute of Physics.