Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apjs...52..387a&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 52, Aug. 1983, p. 387-398. Research supported by the Science and
Astronomy and Astrophysics
Astrophysics
62
Astronomical Spectroscopy, Atomic Excitations, Oxygen Spectra, Transition Probabilities, Electron Energy, Fine Structure, Oxygen Ions
Scientific paper
Electron collision strengths have been calculated for 146 transitions among the fine-structure levels in O III using a suitable transformation of LS coupling reactance matrix elements computed with the R-matrix method. These have been obtained at a fine energy grid in an energy region below 5.16 Ry and are found to be varying with electron energy, exhibiting a complicated resonance structure in almost the entire energy range. These have been averaged over a Maxwellian distribution of electron energies to get the effective collision strengths which are very simply related to the excitation and the de-excitation rate coefficients. The results are tabulated in a temperature region below 60,000 K. These are the first extensive results in the literature and are believed to be highly useful for astrophysical plasma diagnostics.
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