Publications in Scientific Journals:
S. Löffler, I. Ennen, F. Tian, P. Schattschneider, N. Jaouen:
"Breakdown of the dipole approximation in core losses";
Ultramicroscopy,
111
(2011),
8;
1163
- 1167.
English abstract:
The validity of the dipole approximations commonly used in the inelastic scattering theory for transmission electron microscopy is reviewed. Both experimental and numerical arguments are presented, emphasizing that the dipole approximations cause significant errors of the order of up to 25% even at small momentum transfer. This behavior is attributed mainly to non-linear contributions to the dynamic form factor due to the overlap of wave functions.
Keywords:
EELS; Ionization edges; Dipole approximation; Scattering cross section
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.ultramic.2011.03.006
Created from the Publication Database of the Vienna University of Technology.