DYNAMICS OF SIMPLE CHARGED FLUIDS WITH HARD SOFT SPHERE SHORT-RANGE INTERACTION/

By using the memory function formalism we studied the charge-charge fl uctuations in a charged symmetric simple fluid. We consider a hard/sof t sphere short range interaction to deal with the divergence caused by the hard sphere pure potential. We assumed an exponential dependence for the second order memory function. This hypothesis together with th e distribution function obtained by using the mean spherical approxima tion (MSA) yields an algebraic equation for the relaxation time, This equation can be solved by the use of the fourth and sixth order freque ncy momenta. In this way, we obtain some expressions for the relaxatio n times, On this basis, we analyze the structure factor of the charge- charge fluctuations and the dielectric response function of symmetric molten salts. (C) 1997 Published by Elsevier Science B.V.