Electronic Resource
[S.l.]
:
International Union of Crystallography (IUCr)
Acta crystallographica
38 (1982), S. 773-779
ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
A multislice formula for many-beam calculation of dynamical electron diffraction amplitudes which may be applied for inclined illumination has been derived based on the Schrödinger equation. This formula clearly shows the following points: a specimen should be considered as sliced parallel to the entrance surface; a spherical propagation function should be used, giving the exact excitation error measured along the surface normal; the interaction constant in the phase-grating function should be changed; the phase grating should be projected along the beam direction. A new parameter for the strength of the upper-layer interaction in the case of the inclined illumination is proposed in terms of the excitation error of the reciprocal-lattice points used to define the projected potential. It is pointed out that the potential projected along the beam direction may better represent the upper-layer interactions for the inclined illumination.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739482001594
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