dynamical extinction
dynamical extinction
Reflections that are forbidden due to a screw axis or a glide plane (symmetry element of a space group) become allowed (not forbidden) owing to the dynamical diffraction effect (Umweganregung). However, if two symmetric Umweganregung paths to the forbidden reflection take the same excitation errors, the waves that travel these two paths cancel out. This cancellation of the waves is termed "dynamical extinction." The dynamical extinction appears as a dark band in the forbidden reflection disks in a CBED pattern. The dark band is utilized for identifying a screw axis or a glide plane.
Related Term(s)
Term(s) with "dynamical extinction" in the description
Are you a medical professional or personnel engaged in medical care?
No
Please be reminded that these pages are not intended to provide the general public with information about the products.
