Scattering Intensity of Non-Crystalline Materials Including the Correlation between the Thermal Displacements

Abstract

A general expression of the scattering intensity for non-crystalline materials has been proposed by introducing the correlations of the thermal displacements of atoms. The statistical average of the scattering intensity consists of two contributions; thermal vibrations and static disordered arrangements. The profiles of the X-ray scattering intensity for amorphous Pd₈₀Si₂₀ and the neutron thermal scattering intensity for amorphous Ge are discussed with the present theory including the correlations of the thermal displacements of atoms.