International Union of Crystallography. Commission on Crystallographic Apparatus and Commission on Charge, Spin and Momentum Densities. The theoretical models of extinction. Their domain of applicability
Year: 1977
Type: article
Abstract: The various theoretical models of extinction are critically reviewed. It is shown that the Darwin energy transfer equations are valid as long as the mean coherence distance in the sample is smaller than the extinction length, as demonstrated recently by Kato. The available solution is correct when the entrance and exit surface do not overlap and the approximation is seen to be reasonable for more complicated cases. The correlation between primary and secondary extinction is discussed. It is emphasized, in practical applications, that many tests, both theoretical and experimental (when possible) of the correctness of the correction should be made. Only samples that fit a given diffraction theory should be used for accurate studies like charge density determination.
Source: Acta Crystallographica Section A
Author: P. Becker
Institution: Centre National de la Recherche Scientifique
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2052299571