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Table C.2

Compilation of recombination reactions*

No. Reaction Rate coefficient cm3 s−1 Reference
1 Ar+ + e → Ar + hv 4.26 × 10−12(Te/300)−0.63 Stevefelt et al. (1975)
2 C+ + e → C + hv 4.67 × 10−12(Te/300)−0.60 Vuitton et al. (2019)
3 H+ + e → H + hv 3.50 × 10−12(Te/300)−0.7C1 Vuitton et al. (2019)
4 He+ + e → He + hv 5.36 × 10−12(Te/300)−0.50 Lo et al. (2020)
5 N+ + e → N + hv 3.50 × 10−12(Te/300)−0.70 Vuitton et al. (2019)
6 O+(4S) + e → O + hv 1.97 × 10−12(Te/300)−0.47 Nahar (1999)
7 O+(2D) + e → O + hv 1.98 × 10−12(Te/300)−0.39 Nahar (1999)
8 O+(2p) + e → O + hv 1.34 × 10−12(Te/300)−0.44 Nahar (1999)
9 ArH+ + e → Ar + H 1.00 × 10−9 Lo et al. (2020)
10 CH+ + e → C + H 1.00 × 10−7(Te/300)−0.37 Vuitton et al. (2019)
11 CH2++e→C+H+H${{\rm{CH}}_2^ + + {\rm{e}} \to {\rm{C}} + {\rm{H}} + {\rm{H}}}$ 4.03 × 10−7(Te/300)−0.60 Vuitton et al. (2019)
12 CH2++e→CH+H${{\rm{CH}}_2^ + + {\rm{e}} \to {\rm{CH}} + {\rm{H}}}$ 1.60 × 10−7(Te/300)−0.60 Vuitton et al. (2019)
13 CH2++e→C+H2${{\rm{CH}}_2^ + + {\rm{e}} \to {\rm{C}} + {{\rm{H}}_2}}$ 7.68 × 10−8(Te/300)−0.6C1 Vuitton et al. (2019)
14 CO+ + e → O + C 2.09 × 10−7(Te/300)−0.55 Rosén et al. (1998)
15 CO+ + e → O + C(1D) 3.99 × 10−8(Te/300)−0.55 Rosén et al. (1998)
16 CO+ + e → O(1D) + C 2.59 × 10−8(Te/300)−0.55 Rosén et al. (1998)
17 CO2++e→CO+O${{\rm{CO}}_2^ + + {\rm{e}} \to {\rm{CO}} + {\rm{O}}}$ 4.20 × 10−7(Te/300)−0.75 Vuitton et al. (2019)
18 H2++e→H+H${{\rm{H}}_2^ + + {\rm{e}} \to {\rm{H}} + {\rm{H}}}$ 1.60 × 10−8(Te/300)−0.43 Vuitton et al. (2019)
19 H2O+ + e → O + H + H 3.05 × 10−7(Te/300)−0.50 Vuitton et al. (2019)
20 H2O+ + e → H2 + O 3.87 × 10−8(Te/300)−0.50 Vuitton et al. (2019)
21 H2O+ + e → OH + H 8.60 × 10−8(Te/300)−0.50 Vuitton et al. (2019)
22 H3++e→H+H+H${{\rm{H}}_3^ + + {\rm{e}} \to {\rm{H}} + {\rm{H}} + {\rm{H}}}$ 4.36 × 10−8(Te/300)−0.52 Vuitton et al. (2019)
23 H3++e→H2+H${{\rm{H}}_3^ + + {\rm{e}} \to {{\rm{H}}_2} + {\rm{H}}}$ 2.34 × 10−8(Te/300)−0.52 Vuitton et al. (2019)
24 H3O+ + e → OH + H + H 5.09 × 10−7(Te/300)−0.83 Vuitton et al. (2019)
25 H3O+ + e → H2O + H 1.37 × 10−7(Te/300)−0.83 Vuitton et al. (2019)
26 H3O+ + e → OH + H2 8.36 × 10−8(Te/300)−0.83 Vuitton et al. (2019)
27 H3O+ + e → H2 + O + H 3.04 × 10−8(Te/300)−0.83 Vuitton et al. (2019)
28 HCO+ + e → CO + H 1.56 × 10−7(Te/300)−1.2C1 Vuitton et al. (2019)
29 HCO+ + e → OH + C 1.19 × 10−8(Te/300)−1.20 Vuitton et al. (2019)
30 HCO+ + e → CH + O 1.70 × 10−9(Te/300)−1.20 Vuitton et al. (2019)
31 HeH+ + e → He + H 3.00 × 10−8(Te/300)−0.50 Strömholm et al. (1996)
32 HNO+ + e → NO + H 4.00 × 10−7(Te/300)−0.70 Vuitton et al. (2019)
33 HO2++e→O2+H${\rm{HO}}_2^ + + {\rm{e}} \to {{\rm{O}}_2} + {\rm{H}}$ 3.00 × 10−7(Te/300)−0.50 Lo et al. (2020)
34 HOC+ + e → CO + H 1.56 × 10−7(Te/300)−1.2C1 Vuitton et al. (2019)
35 HOC+ + e → OH + C 1.19 × 10−8(Te/300)−1.20 Vuitton et al. (2019)
36 HOC+ + e → CH + O 1.70 × 10−9(Te/300)−1.20 Vuitton et al. (2019)
37 HOCO+ + e → CO + O + H 8.16 × 10−7(Te/300)−0.64 Vuitton et al. (2019)
38 HOCO+ + e → CO + OH 3.24 × 10−7(Te/300)−0.64 Vuitton et al. (2019)
39 HOCO+ + e → CO2 + H 6.00 × 10−8(Te/300)−0.64 Vuitton et al. (2019)
40 N2++e→N+N(2D)${{\rm{N}}_2^ + + {\rm{e}} \to {\rm{N}} + {\rm{N}}\left( {^2{\rm{D}}} \right)}$ 8.14 × 10−8(Te/300)−0.39 Dutuit et al. (2013)
41 N2++e→N+N(2P)${{\rm{N}}_2^ + + {\rm{e}} \to {\rm{N}} + {\rm{N}}\left( {^2{\rm{P}}} \right)}$ 2.42 × 10−8(Te/300)−0.39 Dutuit et al. (2013)
42 N2++e→N(2D)+N(2D)${{\rm{N}}_2^ + + {\rm{e}} \to {\rm{N}}\left( {^2{\rm{D}}} \right) + {\rm{N}}\left( {^2{\rm{D}}} \right)}$ 1.14 × 10−7(Te/300)−0.39 Dutuit et al. (2013)
43 N2H+ + e → N2 + H 2.47 × 10−7(Te/300)−0.84 Vuitton et al. (2019)
44 N2H+ + e → NH + N 1.30 × 10−8(Te/300)−0.84 Vuitton et al. (2019)
45 NH+ + e → N + H 4.30 × 10−8(Te/300)−0.50 Vuitton et al. (2019)
46 NH2++e→N+H+H${{\rm{NH}}_2^ + + {\rm{e}} \to {\rm{N}} + {\rm{H}} + {\rm{H}}}$ 1.71 × 10−7(Te/300)−0.50exp(−17.1/Te) Vuitton et al. (2019)
47 NH2++e→NH+H${{\rm{NH}}_2^ + + {\rm{e}} \to {\rm{NH}} + {\rm{H}}}$ 1.29 × 10−7(Te/300)−0.50exp(−17.1/Te) Vuitton et al. (2019)
48 NO+ + e → O + N 1.01 × 10−7(Te/300)−0.75 Vuitton et al. (2019)
49 NO+ + e → O + N(2D) 3.19 × 10−7(Te/300)−0.75 Vuitton et al. (2019)
50 O2++e→O+O${{\rm{O}}_2^ + + {\rm{e}} \to {\rm{O}} + {\rm{O}}}$ 5.17 × 10−8(Te/300)−0.70 Petrignani et al. (2005)
51 O2++e→O+O(1D)${{\rm{O}}_2^ + + {\rm{e}} \to {\rm{O}} + {\rm{O}}\left( {^1{\rm{D}}} \right)}$ 9.22 × 10−8(Te/300)−0.70 Petrignani et al. (2005)
52 O2++e→O(1D)+O(1D)${{\rm{O}}_2^ + + {\rm{e}} \to {\rm{O}}\left( {^1{\rm{D}}} \right) + {\rm{O}}\left( {^1{\rm{D}}} \right)}$ 3.98 × 10−8(Te/300)−0.70 Petrignani et al. (2005)
53 O2++e→O(1D)+O(1S)${{\rm{O}}_2^ + + {\rm{e}} \to {\rm{O}}\left( {^1{\rm{D}}} \right) + {\rm{O}}\left( {^1{\rm{S}}} \right)}$ 1.13 × 10−8(Te/300)−0.70 Petrignani et al. (2005)
54 OH+ + e → O + H 3.75 × 10−8(Te/300)−0.50 Vuitton et al. (2019)

* Various recombination reactions included in our model, along with the rate constants in Gaussian units (Te in units of K) and the respective source references.

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