Fig. 5
Comparison of excitation data for the 2s22p3 4S3/2 ← 2s2p4 2P3/2 transition (1–12) of S9+. Here, BR00 refers to the R-matrix calculation of Bell & Ramsbottom (2000), BL03 to the DW result of Bhatia & Landi (2003b) and ICFT to the present calculation. Upper panel: effective collision strengths – the BR00 without pseudo-resonances result was re-derived by us from the said original collision strengths provided by Ramsbottom (2011 priv. comm.). Lower panel: scaled collision strengths, with the scaling parameter C set to 2.0. (Colour online.)
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