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Measurement of quantities related to the charge and momentum densities of atoms and molecules by use of keV electron scattering
Author(s) -
Bonham R. A.,
Wellenstein H. F.
Publication year - 2009
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560070746
Subject(s) - atomic physics , electron , scattering , helium , momentum (technical analysis) , electron scattering , charge (physics) , physics , chemistry , nuclear physics , optics , quantum mechanics , finance , economics
Experiments utilizing keV incident electrons scattered from atomic and molecular targets are described. The scattered electron intensity as a function of both scattered angle and energy lost by the incident electron upon collision with the target is recorded. Data of this type collected over a grid of both angle and energy loss values define a surface which contains extensive information concerning the electronic structure of the target system. The various regions of interest on this surface and their relationship to charge and momentum density are described within the framework of the first Born approximation. The theory is compared to recently collected data on atomic helium and molecular hydrogen.