Table 1.
Experiments performed at IEM-CSIC-Madrid.
| Exp. | LASW/LCH4 | ramp | Tiso | % CH4 | % CH4 | % CH4 | |
|---|---|---|---|---|---|---|---|
| nm nm | K min−1 | K | 30 K | ini Tiso | fin Tiso | ||
| M1 | s | 146/19 | 5 | 50 | 17.3 | 10.6 | 7.3 |
| M2 | s | 228/17 | 5 | 50 | 6.5 | 5.9 | 3.1 |
| M3 | s | 275/36 | 20 | 50 | 13.4 | 10.5 | 8.2 |
| M4 | s | 344/16 | 10 | 50 | 3.6 | 3.6 | 2.4 |
| M5 | s | 410/40 | 10 | 50 | 8.9 | 7.7 | 5.3 |
| M6 | s | 453/47 | 5 | 50 | 9.2 | 8.3 | 5.8 |
| M7 | c | 185 | 10 | 50 | 13.8 | 12.1 | 7.3 |
| M8 | c | 201 | 5 | 50 | 13.2 | 11.4 | 7.0 |
| M9 | c | 212 | 5 | 50 | 12.0 | 8.8 | 5.7 |
| M10 | c | 567 | 5 | 55 | 7.6 | 6.3 | 4.6 |
| M11 | s | 487/37 | 5 | 55 | 6.5 | 6.0 | 4.9 |
| M12 | c | 467 | 5 | 60 | 5.3 | 4.8 | 3.9 |
Notes. We note that s or c stands for sequential or co-deposited experiments, respectively; LCH4 and LASW refer to the thickness of the CH4 and H2O layers (s experiments), or to the mixture ice thickness (c experiments) at 30 K. Columns six, seven, and eight present the number of molecules ratio in percentage (100 × NCH4/NH2O) of CH4 at 30 K, at the beginning, and at the end of the isothermal experiment.
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