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Table 1
Inelastic collision cross sections included in the model atom.
| Process | Equation | Method | Ref. |
|---|---|---|---|
| Electron impact excitation | Fe i(i) + e− ↔ Fe i(j) + e− | B-spline R-matrix | a |
| Fe ii(i) + e− ↔ Fe ii(j) + e− | R-matrix | b,c | |
| Electron impact ionisation | Fe i(i) + e− ↔ Fe ii(j) + 2e− | Semi-empirical | d |
| Fe ii(i) + e− ↔ Fe iii (j) + 2e− | |||
| Hydrogen impact excitation | Fe i(i) + H(n = 1) ↔ Fe i(j) + H(n = 1) | Asymptotic model (LCAO) | e |
| Free electron model | f | ||
| Fe ii(i) + H(n = 1) ↔ Fe ii(j) + H(n = 1) | Asymptotic model (Simplified) | g | |
| Drawin | h | ||
| Charge transfer | Fe i(i) + H(n = 1) ↔ Fe ii(j) + H− | Asymptotic model (LCAO) | e |
| Fe ii(i) + H(n = 1) → Fe iii(j) + H− | Asymptotic model (Simplified) | g |
References. (a) Wang et al. (2018); (b) Bautista et al. (2015); (c) Zhang & Pradhan (1995); (d) Allen (1973); (e) Barklem (2018); (f) Kaulakys (1991); (g) Yakovleva et al. (2019); (h) Lambert (1993).
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