Fig. 2

Matrix with electron collisional rate coefficients at 5000 K taken from the extension of the calculations made in Zatsarinny et al. (2006) and used in this work. The colours represent the rate coefficients in a logarithmic scale. The crosses indicate one-electron transitions. Transitions involving the 4s.5g levels are not calculated and approximation formulas (valid only for one-electron transitions) are used.
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