A Comparison of Diffuse Scattering by Defects Measured in Anomalous Transmission and Near Bragg Reflections

Abstract

The diffuse scattering from neutron-irradiation-produced defects in copper was measured in anomalous transmission and near the 111 Bragg reflection. The results were related through the theory of Dederichs, and the intensities and forms of the scattering curves obtained from the two measurements were found to be in good agreement over a wide range of defect concentrations and sizes. It was shown that the intercept of a plot of the diffuse scattering intensity Is (q0) vs In (q0) is at q0=e1/2/R for defects of uniform radius R and at q0 ≌1/R0 e for an exponential size distribution of average size R0 .