Electron impact excitation of S-like iron

Details Electron impact excitation of S-like iron Electron impact excitation of S-like iron

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.338..412a&link_type=abstract

Monthly Notice of the Royal Astronomical Society, Volume 338, Issue 2, pp. 412-424.

Astronomy and Astrophysics

Astronomy

18

Atomic Data, Atomic Processes

Scientific paper

Energy levels and radiative rates for transitions among the lowest 48 fine-structure levels belonging to the (1s22s22p6) 3s23p4, 3s3p5, 3s23p33d and 3p6 configurations of FeXI have been calculated using the fully relativistic GRASP code. Additionally, collision strengths for transitions among these levels have also been computed using the Dirac Atomic R-matrix Code (DARC) of Norrington & Grant. Radiative rates and oscillator strengths are tabulated for all allowed transitions among the 48 fine-structure levels, while collision strengths are reported at three energies above thresholds, i.e. 8, 16 and 24 Ryd for a few representative transitions. Furthermore, excitation rates have been calculated in a wide electron temperature range below 5 × 106 K, and the contribution of resonances has been included in the threshold regions. Comparisons are made with the earlier available theoretical and experimental rates, and it is concluded that the experimental rates are overestimated by up to a factor of 2.

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