InternationalReciprocal spaceTables for Crystallography Volume B Edited by U. Shmueli © International Union of Crystallography 2010 |
International Tables for Crystallography (2010). Vol. B, ch. 2.5, pp. 301-302
## Section 2.5.2.4. Scattering of electrons by crystals; approximations J. M. Cowley
^{a} |

The forward-scattering approximation to the many-beam dynamical diffraction theory outlined in Chapter 5.2
provides the basis for the calculation of diffraction intensities and electron-microscope image contrast for thin crystals. [See Cowley (1995), Chapter 5.2
and *IT* C (2004) Sections 4.3.6
and 4.3.8
.] On the other hand, there are various approximations which provide relatively simple analytical expressions, are useful for the determination of diffraction geometry, and allow estimates to be made of the relative intensities in diffraction patterns and electron micrographs in favourable cases.

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