Table 1
Summary of experiment parameters.
| #Exp. tag | T | N0(H2O) (a) | N0(CH3OH) (b) | CH3OH/H2O (c) | QMS range | Displayed | Destr. cross section |
|---|---|---|---|---|---|---|---|
| K | (1016cm−2) | (1016cm−2) | amu | in Fig. | (10−13cm2) | ||
| 29W3 | 10 | – | 317.7 | – | 1–50 | 2 (upper) | 5 ± 1 |
| 28W2BIS | 10 | – | 64.3 | – | 1–50 | 2 (middle) | 5.9 ± 1.5 |
| 28W3BIS | 10 | – | 7.52 | – | 1–50 | 2 (lower) | |
| 28W3 | 10 | 20.6 | 1.23 | 0.06 | 1–33 | 4 | |
| 29W3BIS | 10 | 14.5 | 17.8 | 1.22 | 1–33 | 3 | |
| #Exp. tag | T | N0(H2O) (a) | N0(CH3OOCH3) (b) | CH3OOCH3/H2O (c) | QMS range | Displayed | |
| K | (1016cm−2) | (1016cm−2) | amu | in Fig. | |||
| 29W2BIS | 10 | – | 6.15 | – | 1–80 | 6 | 7 ± 1.5 |
| 29W1BIS | 10 | 15.1 | 1.95 | 0.13 | 1–80 | 7 | |
Notes. Column density uncertainties are dominated by the uncertainties of integrated band strengths given in Table 2. (a) From the O-H stretching mode, with an adopted integrated absorption cross section of A = 2.2 × 10−16 cm molecule−1. When methanol becomes an important fraction of the mixture, the methanol contribution to the O-H is evaluated from its C-O stretching mode, and then subtracted, adopting an integrated absorption cross section of A(C-O) = 1.5 × 10−17 cm molecule−1 and A(OH) = 1.1 × 10−16 cm molecule−1. (b) From the C-O stretching mode, with an adopted integrated absorption cross section of A = 1.5 × 10−17 cm molecule−1. (c) Initial fraction before irradiation starts.
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