Measurable structure factor of a multi-species polydisperse Percus-Yevick fluid with Schulz distributed diameters

An analytical function is presented of the measurable structure factor of a multi-species polydisperse Percus-Yevick fluid consisting of spherical par ticles with Schulz distributed diameters. As a demonstration, polydispersit y effects on some structural properties in the single species polydisperse fluid are investigated. These properties include the measurable structure f actor, the structure factor describing the total density fluctuation, and t he differential cross section of the particle scattering. A discussion is a lso given on their behaviours by comparing them with each other.