Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apjs...56..303a&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 56, Nov. 1984, p. 303-314. Research supported by the Science and
Astronomy and Astrophysics
Astrophysics
17
Atomic Excitations, Configuration Interaction, Electron Impact, Forbidden Transitions, Magnesium, Transition Probabilities, Astrophysics, Cosmic Plasma, Electron Energy, Electron Scattering, Least Squares Method, Maxwell-Boltzmann Density Function, Plasma Density, Plasma Temperature, Wave Functions
Scientific paper
The R-matrix approach has been applied to the electron impact excitation of forbidden transitions among the 1s2 2s2 2p2, 1s2 2s 2p3, and 1s2 2p4 configurations of Mg VII, using the nonrelativistic configuration interaction wave functions to compute the electron collision strengths. These strengths show a complex resonance structure over the entire threshold energy region. The entire collision strength spectrum has been averaged over a Maxwellian distribution of electron velocities to get the effective collision strengths, from which the excitation and deexitation rate coefficients are easily obtainable. The results are listed at a series of electron temperatures below 500,000 K, which are suitable for astrophysical applications.
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