Direction Dependence of the Intensity Anomaly of the X-Ray Thermal Scattering Accompanying the Bragg Case Reflection

Using a germanium single crystal and Cu Kα radiation, an intensity of the x-ray thermal scattering accompanying the Bragg case reflection was observed, and found to depend very much on the direction of an observation. This result could be theoretically interpreted as an interference phenomenon between thermal scattering caused by a diffracted beam and that by a transmitted beam in a crystal.