Table 4
Species and main parameters of the processes considered in our standard model.
| N C |
|
q | N H | IP | α (300 K) | E 0 | A diss | k+ H (300 K) | k + H2 | |
| [eV] | [cm3 s-1] | [eV] | [s-1] | [cm3 s-1] | [cm3 s-1] | |||||
|
|
||||||||||
|
24 | 12 | 2n | 7.02 | − | 4.8 | 6.8 × 1017 | 0/3 × 10-13 | 0 | |
| 0 | 2n + 1 | 7.02 | − | 3.2 | 0/3 × 10-11 | 0 | ||||
| 13 | 7.02 | − | 3.2 | 0/3 × 10-13 | 0 | |||||
| 2n | − | 1.0 × 10-5 | 4.8 | 1.4 × 10-10 | 0/5 × 10-13 | |||||
| + | 2n + 1 | − | 1.0 × 10-5 | 3.2 | 5 × 10-11 | 0/5 × 10-13 | ||||
| 13 | − | 1.0 × 10-5 | 3.2 | − | − | |||||
|
|
||||||||||
|
54 | 18 | 2n | 6.14 | − | 4.8 | 6.8 × 1017 | 0/3 × 10-13 | 0 | |
| 0 | 2n + 1 | 6.14 | − | 3.2 | 0/3 × 10-11 | 0 | ||||
| 19 | 6.14 | − | 3.2 | 0/3 × 10-13 | 0 | |||||
| 2n | − | 1.4 × 10-5 | 4.8 | 9.3 × 10-11 | 0/5 × 10-13 | |||||
| + | 2n + 1 | − | 1.4 × 10-5 | 3.2 | 5 × 10-11 | 0/5 × 10-13 | ||||
| 19 | − | 1.4 × 10-5 | 3.2 | − | − | |||||
|
|
||||||||||
|
66 | 20 | 2n | 5.71 | − | 4.8 | 6.8 × 1017 | 0/3 × 10-13 | 0 | |
| 0 | 2n + 1 | 5.71 | − | 3.2 | 0/3 × 10-11 | 0 | ||||
| 21 | 5.71 | − | 3.2 | 0/3 × 10-13 | 0 | |||||
| 2n | − | 1.56 × 10-5 | 4.8 | 8.5 × 10-11 | 0/5 × 10-13 | |||||
| + | 2n + 1 | − | 1.56 × 10-5 | 3.2 | 5 × 10-11 | 0/5 × 10-13 | ||||
| 21 | − | 1.56 × 10-5 | 3.2 | − | − | |||||
|
|
||||||||||
|
96 | 24 | 2n | 5.68 | − | 4.8 | 6.8 × 1017 | 0/3 × 10-13 | 0 | |
| 0 | 2n + 1 | 5.68 | − | 3.2 | 0/3 × 10-11 | 0 | ||||
| 25 | 5.68 | − | 3.2 | 0/3 × 10-13 | 0 | |||||
| 2n | − | 1.85 × 10-5 | 4.8 | 7.0 × 10-11 | 0/5 × 10-13 | |||||
| + | 2n + 1 | − | 1.85 × 10-5 | 3.2 | 5 × 10-11 | 0/5 × 10-13 | ||||
| 25 | − | 1.85 × 10-5 | 3.2 | − | − | |||||
Notes. The columns give: (1) the structure of the species studied in
this paper in their neutral normally hydrogenated state; (2) the number
NC of C-atoms in the species; (3) the number
of
H-atoms in the normally hydrogenated state; (4) the charge q of the
species; (5) the number NH of H-atoms in the species
(2n is for normally hydrogenated PAHs and PAHs missing an even
number of H-atoms, 2n + 1 is for PAHs missing an even number of
H-atoms; other values are superhydrogenated states); (6) the ionization potential IP
of the species; (7) the rate of recombination α with electrons at
300 K; (8) the binding energy E0; (9) the
pre-exponential factor Adiss used in Eq. (3); (10) the reaction rate for H-atom
addition at 300 K; (11) the rate for reaction with H2. For (10) and (11),
when two values are given, they correspond to the lower/upper limits considered in
our model.
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