Title of article
Breakdown of the dipole approximation in core losses
Author/Authors
Lِffler، نويسنده , , Alla S. and Ennen، نويسنده , , I. and Tian، نويسنده , , F. and Schattschneider، نويسنده , , P. and Jaouen، نويسنده , , N.، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 2011
Pages
5
From page
1163
To page
1167
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
scattering cross section , Ionization edges , eels , Dipole approximation
Journal title
Ultramicroscopy
Serial Year
2011
Journal title
Ultramicroscopy
Record number
2158331
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