Table 5. Electron collisions.
| No. | E Thr (eV) | Reaction (rxn) | Rate a , b | Ref. |
| Elastic scattering and momentum transfer | ||||
| 1 | 0.00 | e + He → He + e | f(E) | 82 and 83 |
| 2 | 0.00 | e + H2O → H2O + e | f(E) | 84 and 89 |
| 3 | 0.00 | e + O2 → O2 + e | f(E) | 90 |
| Electron impact excitation and ionisation | ||||
| 4 | 19.80 | e + He → He* + e | f(E) | 82 and 83 |
| 5 | 20.62 | e + He → He* + e | f(E) | 82 and 83 |
| 6 | 24.58 | e + He → He+ + e | f(E) | 82 and 83 |
| 7 | 4.77 | e + He* → He+ + 2e | f(E) | 91 c |
| 8 | 3.90 | e + He2* → He2+ + 2e | 2.06 × 10–13e–4.28/Te | 92 d |
| 9 | 0.20 | e + H2O → H2O + e | f(E) | 84 e |
| 10 | 0.45 | e + H2O → H2O + e | f(E) | 84 e |
| 11 | 0.47 | e + H2O → H2O + e | f(E) | 84 e |
| 12 | 13.50 | e + H2O → H2O+ + 2e | f(E) | 84 |
| 13 | 13.50 | e + OH → OH+ + 2e | f(E) | 93 |
| 14 | 1.97 | e + O → O(1D) + e | f(E) | 94 |
| 15 | 4.19 | e + O → O(1S) + e | f(E) | 94 |
| 16 | 13.62 | e + O → O+ + 2e | f(E) | 94 |
| 17 | 11.65 | e + O(1D) → O+ + 2e | f(E) | 91 c |
| 18 | 9.43 | e + O(1S) → O+ + 2e | f(E) | 95 c |
| 19 | 0.02 | e + O2 → O2 + e | f(E) | 90 f |
| 20 | 0.19 | e + O2 → O2 + e | f(E) | 90 e |
| 21 | 0.19 | e + O2 → O2 + e | f(E) | 90 e |
| 22 | 0.38 | e + O2 → O2 + e | f(E) | 90 e |
| 23 | 0.38 | e + O2 → O2 + e | f(E) | 90 e |
| 24 | 0.57 | e + O2 → O2 + e | f(E) | 90 e |
| 25 | 0.75 | e + O2 → O2 + e | f(E) | 90 e |
| 26 | 0.98 | e + O2 → O2(a 1Δ) + e | f(E) | 90 |
| 27 | 1.63 | e + O2 → O2(b 1Σ) + e | f(E) | 90 |
| 28 | 4.50 | e + O2 → O2 + e | f(E) | 90 g |
| 29 | 12.06 | e + O2 → O2+ + e | f(E) | 90 |
| 30 | 0.02 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 19 h |
| 31 | 0.19 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 20 h |
| 32 | 0.19 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 21 h |
| 33 | 0.38 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 22 h |
| 34 | 0.38 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 23 h |
| 35 | 0.57 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 24 h |
| 36 | 0.75 | e + O2(a 1Δ) → O2(a 1Δ) + e | f(E) | As rxn 25 h |
| 37 | 0.65 | e + O2(a 1Δ) → O2(b 1Σ) + e | f(E) | 96 i |
| 38 | 3.52 | e + O2(a 1Δ) → O2 + 2e | f(E) | As rxn 28 h |
| 39 | 11.08 | e + O2(a 1Δ) → O2+ + e | f(E) | As rxn 29 h |
| 40 | 0.02 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 19 h |
| 41 | 0.19 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 20 h |
| 42 | 0.19 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 21 h |
| 43 | 0.38 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 22 h |
| 44 | 0.38 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 23 h |
| 45 | 0.57 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 24 h |
| 46 | 0.75 | e + O2(b 1Σ) → O2(b 1Σ) + e | f(E) | As rxn 25 h |
| 47 | 2.87 | e + O2(b 1Σ) → O2 + e | f(E) | As rxn 28 h |
| 48 | 10.43 | e + O2(b 1Σ) → O2+ + 2e | f(E) | As rxn 29 h |
| Super-elastic collisions | ||||
| 49 | –19.80 | e + He* → He + e | f(E) | 82 and 83 j |
| 50 | –1.97 | e + O(1D) → O + e | f(E) | 94 j |
| 51 | –4.19 | e + O(1S) → O + e | f(E) | 94 j |
| 52 | –0.98 | e + O2(a 1Δ) → O2 + e | f(E) | 90 j |
| 53 | –1.63 | e + O2(b 1Σ) → O2 + e | f(E) | 90 j |
| 54 | –0.65 | e + O2(b 1Σ) → O2(a 1Δ) + e | f(E) | As rxn 37 j |
| Electron impact dissociation | ||||
| 55 | 0.00 | e + He2* → 2He + e | 3.8 × 10–15 | 97 |
| 56 | 13.50 | e + H2O → O(1S) + 2H + e | f(E) | 84 and 98 |
| 57 | 7.62 | e + H2O → H + OH + e | f(E) | 84 and 99 |
| 58 | 9.00 | e + H2O → H + OH + e | f(E) | 84 |
| 59 | 13.00 | e + H2O → H2 + O(1D) + e | 2.42 × 10–14Te–0.062e–22.42/Te | 78 k |
| 60 | 8.80 | e + H2 → 2H + e | f(E) | 100 |
| 61 | 11.37 | e + H2 → 2H + e | f(E) | 101 |
| 62 | 12.96 | e + OH → O + H + e | f(E) | 102 l |
| 63 | e + H2O2 → 2OH + e | 2.36 × 10–15 | 103 m | |
| 64 | 6.00 | e + O2 → O + O + e | f(E) | 90 |
| 65 | 8.40 | e + O2 → O(1D) + O + e | f(E) | 90 |
| 66 | 10.00 | e + O2 → O(1D) + O + e | f(E) | 90 |
| 67 | 5.02 | e + O2(a 1Δ) → O + O + e | f(E) | As rxn 64 h |
| 68 | 7.42 | e + O2(a 1Δ) → O(1D) + O + e | f(E) | As rxn 65 h |
| 69 | 9.02 | e + O2(a 1Δ) → O(1D) + O + e | f(E) | As rxn 66 h |
| 70 | 4.37 | e + O2(b 1Σ) → O + O + e | f(E) | As rxn 64 h |
| 71 | 6.77 | e + O2(b 1Σ) → O(1D) + O + e | f(E) | As rxn 65 h |
| 72 | 8.37 | e + O2(b 1Σ) → O(1D) + O + e | f(E) | As rxn 66 h |
| 73 | 2.60 | e + O3 → O + O2 + e | 1.7 × 10–14Te–0.57e–2.48/Te | 74 and 104 |
| 74 | 5.72 | e + O3 → O(1D) + O2(a 1Δ) + e | 3.22 × 10–13Te–1.18e–9.17/Te | 74 and 104 |
| Dissociative ionisation | ||||
| 75 | 17.50 | e + H2O → OH+ + H + 2e | f(E) | 84 |
| 76 | 25.00 | e + H2O → O+ + 2H + 2e | f(E) | 84 |
| (Dissociative) electron attachment | ||||
| 77 | 5.30 | e + H2O → OH + H– | f(E) | 84 and 105 |
| 78 | 4.43 | e + H2O → H2 + O– | f(E) | 84 and 105 |
| 79 | 4.30 | e + H2O → H + OH– | f(E) | 84 and 105 |
| 80 | 0.00 | e + H2O2 → H2O + O– | f(E) | 106 |
| 81 | 0.00 | e + H2O2 → OH + OH– | f(E) | 106 |
| 82 | 5.38 | e + O2 → O + O– | f(E) | 90 |
| 83 | 3.50 | e + O2(a 1Δ) → O + O– | f(E) | 107 |
| 84 | 2.85 | e + O2(b 1Σ) → O + O– | f(E) | As rxn 83 h |
| 85 | 0.00 | e + O3 → O2 + O– | f(E) | 108 |
| 86 | 0.25 | e + O3 → O2– + O | f(E) | 108 |
| Electron detachment | ||||
| 87 | 1.55 | e + H– → H + e + e | f(E) | 109 |
| 88 | 3.37 | e + OH– → OH + e + e | f(E) | 110 |
| 89 | 2.70 | e + O– → O + e + e | f(E) | 111 |
| 90 | 4.00 | e + O2– → O2 + e + e | f(E) | 174 |
| Recombination | ||||
| 91 | 0.00 | e + H2O+ → H + OH | 8.6 × 10–14Te–0.5 | 112 and 113 |
| 92 | 0.00 | e + H2O+ → 2H + O | 3.05 × 10–13Te–0.5 | 112 and 113 |
| 93 | 0.00 | e + H2O+ → H2 + O | 3.87 × 10–14Te–0.5 | 112 and 113 |
| 94 | 0.00 | e + H+·(H2O) → H + H2O | 7.09 × 10–14Te–0.5 | 112, 114 and 115 |
| 95 | 0.00 | e + H+·(H2O) → OH + H2 | 5.37 × 10–14Te–0.5 | 112, 114 and 115 |
| 96 | 0.00 | e + H+·(H2O) → OH + 2H | 3.05 × 10–13Te–0.5 | 112, 114 and 115 |
| 97 | 0.00 | e + H+·(H2O)2 → H + 2H2O | 1.84 × 10–12Te–0.08 | 116 |
| 98 | 0.00 | e + H+·(H2O)3 → 3H2O + H | 2.24 × 10–12Te–0.08 | 116 |
| 99 | 0.00 | e + H+·(H2O)4 → 4H2O + H | 3.6 × 10–12 | 116 |
| 100 | 0.00 | e + H+·(H2O)5 → 5H2O + H | 4.1 × 10–12 | 117 |
| 101 | 0.00 | e + H+·(H2O)6 → 6H2O + H | 5.13 × 10–12 | 117 |
| 102 | 0.00 | e + H+·(H2O)7 → 7H2O + H | 1.0 × 10–12 | 117 |
| 103 | 0.00 | e + H+·(H2O)8 → 8H2O + H | 4.1 × 10–12 | As rxn 100 |
| 104 | 0.00 | e + H+·(H2O)9 → 9H2O + H | 4.1 × 10–12 | As rxn 100 |
| 105 | 0.00 | e + H2O+·(H2O) → H + OH + H2O | 9.63 × 10–13Te–0.2 | 118 n |
| 106 | 0.00 | e + O2+ → 2O | 3.72 × 10–15Te–0.7 | 119 |
| 107 | 0.00 | e + O2+ → O + O(1D) | 7.44 × 10–15Te–0.7 | 119 and 120 |
| 108 | 0.00 | e + O2+ → 2O(1D) | 7.44 × 10–15Te–0.7 | 119 and 120 |
| 109 | 0.00 | e + O2+·(H2O) → O2 + H2O | 7.22 × 10–13Te–0.2 | 118 |
| 110 | 0.00 | e + O4+ → 2O + O2 | 5.17 × 10–14Te–1.0 | 118 |
| 111 | 0.00 | e + O4+ → 2O2 | 2.76 × 10–13Te–0.5 | 86 |
aIn m3 s–1 and m6 s–1 for two- and three-body processes, respectively.
b f(E) denotes rate coefficients are calculated by the internal GlobalKin two-term Boltzmann equation solver using cross sections obtained from the indicated literature.
cCross sections are calculated from an expression in cited reference.
dCalculated assuming a Maxwell distribution function and cross sections from the given reference.
eVibrational excitation cross section included in cross section set for two-term Boltzmann solver. Vibrational states not simulated self-consistently in reaction kinetics.
fRotational excitation cross section included in cross section set for two-term Boltzmann solver. Rotations states not simulated self-consistently in reaction kinetics.
gElectronic excitation cross section included in cross section set for two-term Boltzmann solver. This electronic state is not simulated self-consistently in reaction kinetics.
hCross section estimated by shifting and scaling the corresponding cross section for the ground state by the excitation threshold of the excited state.
iBorn–Bethe fit to data in the cited reference.
jObtained from reverse process by detailed balance.
kIn the reference reaction rates were calculated using Bolsig+121 and cross sections obtained from the Morgan database122 for a He/H2O plasma.
lCross section assumed to be the same as that for CO.
mValue is approximated in reference based on cross section for electron impact dissociation of O2.
nValue is estimated in reference.