Interpretation of the Neutron or X-Ray Scattering from a Liquid-Like Binary

Abstract

In the general liquid-like binary three radial densities relating to A-A, B-B, and A-B pairs are needed to characterize the scattering. The three densities can be obtained by the Fourier inversion of the weighted combination of three diffraction patterns, each of which differs by the alteration of the scattering of one or both components. If the density of atoms regardless of type is the same around both components, then only two functions, one this distribution, and the other involving the order between A-B pairs is needed to characterize the scattering. This case is the liquid analog of the crystalline alloy with short-range order. These two functions can be obtained by the Fourier inversion of a weighted combination of two patterns differing by the alteration of the scattering of the components.