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Correlated treatment of photoionization cross sections in the orthogonalized plane wave approximation for the ejected electron
Author(s) -
Mishra Manoj,
Öhrn Yngve
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.560180836
Subject(s) - photoionization , plane wave , propagator , ionization , amplitude , electron , wave function , atomic physics , physics , chemistry , quantum mechanics , ion
Expressions are formulated for the correlated treatment of photoionization cross sections using Feynman‐Dyson amplitudes of the electron propagator to describe the ionization processes and an orthogonalized plane wave description for the photoelectron. Explicit equations are derived for the theoretical treatment of experimental cross sections using either spherical grid deflection‐type spectrometers or those using a particular collection angle. A scheme is suggested for systematic improvement of the theoretical description.