Physics – General Physics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrva..36.3117r&link_type=abstract
Physical Review A - General Physics, 3rd Series (ISSN 0556-2791), vol. 36, Oct. 1, 1987, p. 3117-3124.
Physics
General Physics
18
Autoionization, Collision Rates, Electron Scattering, Fluorine, Plasma Interactions, Resonance Charge Exchange, Auger Effect, Forbidden Transitions, Relativistic Theory, Scattering Cross Sections
Scientific paper
The distorted-wave approximation and similar weak-coupling methods are frequently used to calculate electron collision cross sections for studies of astrophysical and laboratory plasmas. Autoionizing resonances neglected in these approximations can significantly enhance the calculated rates for collisional excitation of some transitions in highly charged ions. The effects of such resonances on the excitation rates for n = 2 to n = 2 transitions in fluorinelike Fe, Se, Mo, Ag, Xe, and Eu are investigated. The background excitation rates were calculated using a relativistic distorted-wave approximation, and the detailed Auger and radiative rates were calculated using a multiconfiguration Dirac-Fock model. The largest effect is on the electric-dipole-forbidden transitions. The enhancement diminishes with increasing atomic number for all transitions.
Chen Ming-Hui
Hazi A. U.
Reed J. K.
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