SIMBAD references

We present results for electron-impact excitation of F-like Fe calculated using R-matrix theory where an intermediate-coupling frame transformation (ICFT) is used to obtain level-resolved collision strengths. Two such calculations are performed, the first expands the target using 2s² 2p⁵, 2s 2p⁶, 2s² 2p⁴ 3l, 2s 2p⁵ 3l, and 2p⁶ 3l configurations while the second calculation includes the 2s² 2p⁴ 4l, 2s 2p⁵ 4l, and 2p⁶ 4l configurations as well. The effect of the additional structure in the latter calculation on the n=3 resonances is explored and compared with previous calculations. We find strong resonant enhancement of the effective collision strengths to the 2s² 2p⁴ 3s levels. A comparison with a Chandra X-ray observation of Capella shows that the n=4 R-matrix calculation leads to good agreement with observation.