Table 1
Reactions adopted in our model with chemical desorption efficiencies for reactions on bare and icy surfaces.
| Reaction | Desorbing | Delta HR (eV) | Experimental | Theoretical | Reaction barrier (K) | |
| CDice(exp)* | CDbare(exp)* | CDbare(th) | ||||
|
|
||||||
| O+H | OH | 4.44 | 25 ± 15 | 50 ± 25 | 39 | 0 |
| OH+H | H2O | 5.17 | 30 ± 15 | 50 ± 25 | 27 | 0 |
| O2+H | O2H | 2.24 | <8 | 10 ± 10 | 1.4 | 0a,b |
| O2H+H | H2O2 | 3.69 | <8 | <5 | 0.5 | 0 |
| O2H+H | 2 OH | 1.47 | <8 | <5 | 0.3 | 0 |
| H2O2+H | H2O+OH | 2.95 | <5 | <5 | 2.1 | 1000e |
| O3+H | O2+OH | 3.33 | <10 | <8 | 8 | 480c,d |
| O+O | O2 | 5.16 | <5 | 40–80 | 68 | 0 |
| O2+O | O3 | 1.1 | <5 | <5 | 0 | 0 |
| N+N | N2 | 9.79 | >50 | >70 | 89 | 0 |
| CO+H | HCO | 0.66 | – | 10 ± 8 | 0.7 | 2000f |
| HCO+H | CO+H2 | 3.85 | – | 40 ± 20 | 47 | 130 |
| HCO+H | H2CO | 3.91 | – | <8 | 7 | 0 |
| H2CO+H | CH3O | 0.88 | – | <8 | 0 | 2000f |
| H2CO+H | HCO+H2 | 0.61 | – | 10 ± 5 | 0 | 2200 |
| CH3O+H | CH3OH | 4.56 | <8 | <8 | 2.3 | 0 |
| CO+O | CO2 | 5.51 | <5 | <5 | 22 | 650i |
| H2CO+O | CO2+H2 | 5.45 | <10 | <10 | 8 | 350i |
| CH3O+H | H2CO + H2 | 3.64 | – | – | 1.3 | 150 |
| CH3OH + H | CH3O+H2 | –0.04 | – | – | 0 | 3200 |
| OH+O | O2 + H | 0.72 | – | – | 1.9 | 0 |
| HO2+O | O2+OH | 2.2 | – | – | 17 | 0 |
| O3+O | O2+O2 | 4.06 | – | – | 39 | 2500g |
| O+H2v=1 | OH+H | –0.08 | – | – | 0 | 4600h |
| CO2+H | CO+OH | –1.0 | – | – | 0 | 10000 |
| O+HCO | CO2+H | 4.85 | – | – | 10 | 0i |
| OH+H2 | H2O+H | 0.65 | – | – | 0 | 2100k |
| OH+OH | H2O2 | 2.21 | – | – | 0 | 0 |
| OH+CO | CO2+H | 1.07 | – | – | 0 | 400l |
| OH+HCO | CO2+H2 | 4.93 | – | – | 6 | 0 |
| HO2+H2 | H2O2+H | –0.82 | – | – | 0 | 5000e |
| H2O+H | OH+H2 | –0.65 | – | – | 0 | 9600 |
Notes. Note that the table is longer than in Paper I. Here we report the theoretical CD efficiency for more reactions than have been measured experimentally.
Reference. (a)Mokrane et al. (2009); (b)Chaabouni et al. (2012); (c)Mokrane et al. (2009); (d)Romanzin et al. (2011); (e)Lamberts et al. (2013); (f)Awad et al. (2005); (g)Minissale et al. (2014); (h)Weck & Balakrishnan (2005); (i)Minissale et al. (2013) from ER; (j)Minissale et al. (2015b); (k)Oba et al. (2012); (l)Noble et al. (2011); (∗) work reported in Paper I.
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