Table 6
Calculated photodissociation frequencies (s−1) of major cometary species producing metastable states at 1 au.
| Species | H2O | CO2 | CO | O2 | N2 | CN | |
|---|---|---|---|---|---|---|---|
| O(1S) | 4.2 × 10−8 | 1.0 × 10−6 | 4.0 × 10−8 (‡) | 1.4 × 10−7 | – | – | |
| O(1D) | 1.0 × 10−6 | 1.6 × 10−6 | 7.6 × 10−8 | 3.6 × 10−6 | – | – | |
| C(1D) (§) | – | 1.5 × 10−10 | 7.6 × 10−8 | – | – | 2.0 × 10−6 (†) | |
| N(2D) | – | – | – | – | 3.0 × 10−7 | 1.0 × 10−6 (⋆) |
References. (‡) From Huebner & Carpenter (1979); (⋆)from Singh et al. (1991); (†)this value is calculated using cross section from El-Qadi & Stancil (2013); (§) Huebner et al. (1992) calculated photodissociation frequencies of CH and C2 producing C(1D) are 5.1 × 10−6 and 1.0 × 10−7, respectively.
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