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Table 2
Production and loss processes included in the He(23S) model.
| Name | Process | Rate (a) | References |
|---|---|---|---|
| JH | H + hν → H+ + e− | See text | Osterbrock & Ferland (2006) |
| αH | H+ + e− → H | 2.59  |
Osterbrock & Ferland (2006) |
 |
He(11S) + hν → He+ + e− | See text | Brown (1971) |
| α1 | He+ + e− → He(11S) | 1.54  |
Benjamin et al. (1999) |
 |
He(23S) + hν → He+ + e− | See text | Norcross (1971) |
| α3 | He+ + e− → He(23S) | 2.10  |
Benjamin et al. (1999) |
| q13 | He(11S) + e− → He(23S) + e− | 2.10  exp |
Bray et al. (2000); Oklopčić & Hirata (2018) |
| q31a | He(23S) + e− → He(21S) + e− | 2.10  exp |
Bray et al. (2000); Oklopčić & Hirata (2018) |
| q31b | He(23S) + e− → He(21P) + e− | 2.10  exp |
Bray et al. (2000); Oklopčić & Hirata (2018) |
| Q31 | He(23S) + H → He(11S) + H | 5.00 × 10−10 | Roberge & Dalgarno (1982); Oklopčić & Hirata (2018) |
 |
He+ + H → He(11S) + H+ | 1.25  |
Glover & Jappsen (2007); Koskinen et al. (2013) |
| QHe | He(11S) + H+ → He+ + H | 1.75  exp |
Glover & Jappsen (2007); Koskinen et al. (2013) |
| A31 | He(23S) → He(11S) + hν | 1.272 × 10−4 | Drake (1971); Oklopčić & Hirata (2018) |
Notes. (a) Units are [cm−3 s−1] for the recombination and collisional processes and [s−1] for the otherprocesses. ϒij are the effective collision strengths taken from Bray et al. (2000) at the corresponding temperatures.
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