Fig. 7.
Comparison between the ionization potential shifts obtained by the fitting formula (9) and those computed in this work for iron and oxygen ions. Dashed line: straight line of equality. Circles: Fe II–Fe XXV for μ = 0.1 au. Squares: Fe II–Fe XXV for μ = 0.25 au. Upright triangles: O I–O VII for μ = 0.1 au. Downright triangles: O I–O VII for μ = 0.25 au.
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