Table 1
IR feature used to calculate the column density of selected ice components.
| Molecule | Frequency | Band strength |
| (cm-1) | (cm molec-1) | |
|
|
||
| C2H5OH | 1044 | 7.3 × 10-18 a |
| H2O | 3280 | 2.0 × 10-16 b |
| CH4 | 1304 | 6.4 × 10-18 c |
| CH3OH | 1025 | 1.8 × 10-17 d |
| H2CO | 1720 | 9.6 × 10-18 e |
Notes. Frequencies and band strengths for pure ices at 10 K, except for C2H5OH (see text).
From Moore & Hudson (1998);
from Hagen (1981);
from d’Hendecourt & Allamandola (1986). The same value was used as an approximation for the experiments with 13CH4;
from Schutte et al. (1996).
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