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Table A.1
Collisional and radiative rates.
| No. | Reaction | Rate coefficient cm3s-1/Cross-section σ(cm2) | Reference |
|
|
|||
| 1 | H + e − → H + + 2e − | see reference | AAZN97 |
| 2 | H + + e − → H + γ | see reference | AAZN97 |
| 3 | He + e − → He + + 2e − | see reference | AAZN97 |
| 4 | He + + e − → He + γ |  for Te < 8000 |
AAZN97 |
 for Te > 8000 |
AAZN97 | ||
| 5 | He + + e − → He + + + 2e − | see reference | AAZN97 |
| 6 | He + + + e − → He + + γ |
|
AAZN97 |
| 7 | H + e − → H − + γ | dex [−17.845 + 0.762(log T) + 0.1523(log T)2 − 0.03274(log T)3] for T ≤ 6000 | GJ07 |
| dex [−16.42 + 0.1998(log T)2 − 5.447 × 10-3(log T)4 + 4.0415 | |||
| × 10-5(log T)6] forT > 6000 | GJ07 | ||
| 8 | H − + H → H2 + e− | 1.5 × 10-9 for T ≤ 300 | GJ07 |
| 4.0 × 10-9T-0.17 for T ≤ 300 for T > 300 | GJ07 | ||
| 9 | H + H + →  + γ |
dex [−19.38 − 1.523(log T) + 1.118(log T)2 − 0.1269(log T)3] | GJ07 |
| 10 | H + → H2 + H + |
6.4 × 10-10 | GJ07 |
| 11 | H − + H + → H + H | 5.4 × 10-6T-0.5 + 6.3 × 10-8 − 9.2 × 10-11T0.5 + 4.4 × 10-13T | GJ07 |
| 12 | + e − → H + H |
1.0 × 10-8 forT ≤ 617 | GJ07 |
| 1.32 × 10-6T-0.76 forT > 617 | GJ07 | ||
| 13 | H2 + H + → + H |
see reference | GJ07 |
| 14 | H2 + e − → H + H + e − |
|
GJ07 |
| 15 | H2 + H → H + H + H |
|
GJ07 |
| 16 | H2 + H2 → H2 + H + H |
|
GJ07 |
| 17 | D + e − → D + + e − + e − | see reference | GJ07 |
| 18 | D + + e − → D + γ |
|
GJ07 |
| 19 | H − + e − → H + e − + e − | see reference | GJ07 |
| 20 | H − + H → H + H + e − | see reference | GJ07 |
| 21 | H − + H → H2 + e − | 6.9 × 10-9T-0.35 for T ≤ 8000 | GJ07 |
| 9.6 × 10-7T-0.90 for T > 8000 | GJ07 | ||
| 22 | H + D + → D + H + |
|
GJ07 |
| 23 | D + H + → H + D + |  for T ≤ 2.0 × 105 |
GJ07 |
| 3.44 × 10-10T0.35 for T > 2.0 × 105 | GJ07 | ||
| 24 | H2 + D + → HD + H + | [0.417 + 0.864log T − 0.137(log T)2] × 10-9 | GJ07 |
| 25 | HD + H + → H2 + D + |
|
GJ07 |
| 26 | H2 + D → HD + H |  forT ≤ 200 |
GJ07 |
 forT > 200 |
GJ07 | ||
| 27 | HD + H → D + H2 |  forT ≤ 200 |
GJ07 |
 forT > 200 |
GJ07 | ||
| 28 | H − + γ → H + e − |  for hν > hνth = 0.775 eV |
AAZN97 |
| 29 | H2 + γ → + e − |
σ24 = 0 for hν < 15.42 eV | AAZN97 |
| σ24 = 6.2 × 10-18hν − 9.4 × 10-17cm2 for 15.42 ≤ hν < 16.50 eV | AAZN97 | ||
| σ24 = 1.4 × 10-18hν − 1.48 × 10-17cm2 for 16.50 ≤ hν < 17.7 eV | AAZN97 | ||
| σ24 = 0 for hν ≥ 17.7 eVcm2 for hν ≥ 17.7 eV | AAZN97 | ||
| 30 | + γ → H + H + |
|
|
| for Eth = 2.65 eV2.65 < E < 11.27 eV | GJ07 | ||
|
|||
| for 11.27 < E < 21.0 eV | GJ07 | ||
| 31 | + γ → 2 × H + e − |
AAZN97 | |
| log (σ26) = −16.926 − 4.528 × 102hν + 2.238 × 10-4(hν)2 + 4.245 × 10-7(hν)3 | |||
| for 30 eV < hν < 90 eV | AAZN97 | ||
| 32 | H2 + γ → H2* → H + H | 1.12 × 108J(ν) where J the is flux at E=12.87 eV | AAZN97 |
| 33 | H2 + γ → H + H |  for sigma values see reference |
AAZN97 |
| 34 | H + γ → H + + e − |
|
AAZN97 |
| 35 | He + + γ → He + + + e − |
|
AAZN97 |
| 36 | He + γ → He + + e − |
|
AAZN97 |
| 37 | HD + γ → H + D | see reference | GJ07 |
Notes. In the table above, T denotes the gas temperature in Kelvin, Te the gas temperature in eV, Tr the temperature of radiation in K. dex(x) = 10x.
References. Acronyms: AAZN97: Abel et al. (1997); GJ07: Glover & Jappsen (2007).
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