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Electron ejection cross sections in electron and ion impact ionization: Ab initio and semiempirical calculations
Author(s) -
Manson Steven T.,
Miller John H.
Publication year - 1987
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.560320731
Subject(s) - ionization , atomic physics , ab initio , electron , ion , ab initio quantum chemistry methods , helium , electron ionization , double ionization , born approximation , chemistry , physics , nuclear physics , molecule , organic chemistry
Ab initio calculations of single and double differential cross sections for ionization by fast, charged particles within the framework of Born approximation are presented. In addition, a semiempirical method based on the asymptotic Bethe–Born expansion is also discussed. Both are applied to ionization of helium by electrons and protons in an effort to assess their accuracy and validity. Agreement with experiment is quite good. The implications for other targets is discussed.