Fig. 2
Electron-impact excitation collision strengths versus the impact energy for some selected transitions within the n = 3 complex. Full line: present work; ×: distorted wave calculation with present structure; □: distorted wave calculations of Christensen et al. (1986) for S4 + and Ar6 +, and Landi (2011) for Fe14 +; ⋄: distorted wave calculation of Christensen et al. (1985) for Fe14 +.
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