Kinematical two-dimensional multiple-diffraction intensity profiles. Application to omega-psi scans obtained with CuK alpha radiation

Expressions for the calculation of multiple-diffraction patterns observed i n omega-psi scans of Bragg reflections are derived within the framework of the kinematical theory, taking into account the divergence and wavelength-s pread of the incident beam as well as the mosaicity of the crystal sample. The theoretical results can be applied to X-ray tube radiation as well as s ynchrotron radiation experiments. A 189.9 degrees experimental Cu K alpha ( 2) over bar(2) over bar(2) over bar omega-psi scan of diamond is compared w ith the corresponding theoretical multiple-diffraction pattern.