Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...486.1053a&link_type=abstract
Astronomy and Astrophysics, Volume 486, Issue 3, 2008, pp.1053-1067
Astronomy and Astrophysics
Astrophysics
5
Atomic Data, Atomic Processes
Scientific paper
Aims: In this paper we report calculations for energy levels, radiative rates, and excitation rates for transitions in O IV. Methods: The grasp (general-purpose relativistic atomic structure package) and fac (flexible atomic code) were adopted for calculating energy levels and radiative rates, and the Dirac atomic R-matrix code (darc) used to determine the excitation rates. Results: Oscillator strengths and radiative rates are reported for all E1, E2, M1, and M2 transitions among the lowest 75 levels of O iv. Additionally, lifetimes are reported for all levels and comparisons made with those available in the literature. Finally, effective collision strengths are reported for all transitions over a wide temperature range below 106 K. Comparisons are made with earlier results and the accuracy of the data is assessed.
Tables 3, 5 and 6 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/486/1053
Aggarwal Kanti M.
Keenan Francis P.
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