Table 7
VUV-absorption cross sections for different irradiation energies.
| Irrad. energy | σ | R |
R |
| eV | cm2 | molec./photoninc | molec./photonabs |
|
|
|||
| 10.2 | 1.1 × 10-19 | 6.9 ±2.4 × 10-3 | 12.5 ± 4.4 |
| 9.2 | 2.8 × 10-18 | 1.3 ± 0.91 × 10-2 | 0.9 ± 0.6 |
| † 8.2 | 9.3 × 10-18 | 5 × 10-2 | 1.1 |
|
|
|||
| 8.6 | 4.7 × 10-18 | 5.1 ±0.2 × 10-2 | 2.5 ± 0.1 |
Notes.
Rinc values correspond to Fayolle et
al. (2011), except for 8.6 eV, which is the
average photon energy of our MDHL and the corresponding value of the cross section is
the average VUV-absorption cross section of pure CO ice, deposited at 8 K, in the
120–160 nm range. 
values for a column density of about 5
ML, i.e. where the absorbed photons contribute to a photodesorption event (Muñoz Caro
et al. 2010; Fayolle et al. 2011). † Peak yield value at ~8.2 eV, see Fayolle et al. (2011).
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