Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apjs..148..575z&link_type=abstract
The Astrophysical Journal Supplement Series, Volume 148, Issue 2, pp. 575-582.
Astronomy and Astrophysics
Astronomy
14
Atomic Data, Atomic Processes, Line: Formation
Scientific paper
The B-spline R-matrix approach has been used to calculate electron collisional excitation strengths and rates for transitions between the 3P, 1D, and 1S states of ground configuration and from these states to the states of the excited 2s22p3ns (n=3-5), 2s22p3np (n=3-4), 2s22p3nd (n=3-4), 2s22p34f, and 2s2p5 configurations. The nonorthogonal orbitals are used for an accurate description of both the target wave functions and the R-matrix basis functions. The thermally averaged collision strengths are obtained from the collision strengths by integrating over a Maxwellian velocity distribution of electron energies, and these are tabulated over a temperature range from 1000 to 60,000 K. The parametric functions of scaled energy have also been obtained to represent collision strengths over a wide energy range or thermally averaged collision strengths at any desired temperature.
Tayal Swaraj S.
Zatsarinny Oleg
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