Electron impact ionization of complex ions

Details Electron impact ionization of complex ions Electron impact ionization of complex ions

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203.1269b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, June 1983, p. 1269-1280. Research supported by the

Astronomy and Astrophysics

Astronomy

58

Autoionization, Electron Impact, Ion Charge, Ionic Collisions, Ionization Cross Sections, Nonequilibrium Plasmas, Argon Plasma, Atomic Energy Levels, Atomic Excitations, Born Approximation, Coulomb Collisions, Electron Energy, Ion Beams, Ionization Coefficients, Metal Ions, Strongly Coupled Plasmas

Scientific paper

The procedure suggested by Burgess et al. (1977) to allow for inner-shell excitation and auto-ionization is used with an empirical formula similar in form to that of Lotz (1968) and is compared with a wide range of crossed-beam experimental data for ions having a charge greater than or equal to 2. The general formula obtained for the total ionization cross section, and the corresponding rate coefficient, represents the experimental data to within + or - 23 percent rms deviation. Even though the formula is consistent with the earlier formulas of Seaton (1964, valid only near threshold) and Lotz, it gives a significantly smaller rms deviation through the consistent inclusion of auto-ionization effects. For simple ions, comparisons with much more elaborate quantal calculations are found to be satisfactory. In addition, comparisons are made with the simplified ECIP formula (Burgess, 1964; Burgess and Summers, 1976).

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