Contribution of Thermal Diffuse Scattering to Integrated Bragg Reflections from Perfect Crystals

摘要

It is shown that the contribution of thermal diffuse scattering to integrated Bragg intensities from perfect crystals can be much greater than previously expected. Measurements on the (555) reflection of silicon are presented showing a thermal scattering contribution of about 70% of the true Bragg intensity. The special aspect of the effect in perfect crystals is discussed and methods of reducing it or correcting for it are included.