Plasma environment effects on K lines of astrophysical interest - V. Universal formulae for ionization potential and K-threshold shifts

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Fig. 2

Ionization potential shift, ΔE₀ in eV, as a function of the effective charge, Z_eff, in ions belonging to the nickel isonuclear sequence. Circles: MCDF/RATIP method for μ = 0.1 a.u. Squares: MCDF/RATIP method for μ = 0.25 a.u. Solid line: Debye–Hückel limit for μ = 0.1 a.u. Dashed line: Debye–Hückel limit for μ = 0.25 a.u.

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