Table A.3
Total X2O (X = H, D) or XOY (HOD or DOH) photodesorption probabilities at Tice = 20 K, 30 K, and 60 K per monolayer due to the direct and the kick-out mechanism for X2O and XOY photodissociation in H2O ice.
| H2O∗ | D2O∗ | HOD∗ | DOH∗ | |||||
| ML | H2Odirect | H2Okicked | D2Odirect | H2Okicked | HODdirect | H2Okicked | DOHdirect | H2Okicked |
|
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| Tice = 20 K | ||||||||
|
|
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| 1 | 7.8 ± 1.3 | 0.7 ± 0.4 | 3.3 ± 0.7 | 3.3 ± 0.7 | 4.5 ± 0.9 | 1.6 ± 0.5 | 3.7 ± 0.8 | 4.2 ± 0.8 |
| 2 | 5.5 ± 1.2 | 2.8 ± 0.9 | 7.1 ± 1.1 | 12.5 ± 1.4 | 7.1 ± 1.1 | 3.7 ± 0.8 | 5.9 ± 0.9 | 4.2 ± 0.8 |
| 3 | 0.3 ± 0.2 | 5.9 ± 1.1 | 1.7 ± 0.5 | 13.0 ± 1.5 | 1.0 ± 0.4 | 0.8 ± 0.4 | 0.3 ± 0.2 | 7.0 ± 1.0 |
| 4 | 0.2 ± 0.2 | 0.2 ± 0.2 | 0.00 | 14.0 ± 1.5 | 0.2 ± 0.2 | 3.9 ± 0.8 | 0.00 | 16.0 ± 1.5 |
| ⟨MLs⟩ | 3.4 ± 0.4 | 2.4 ± 0.3 | 3.0 ± 0.4 | 11.0 ± 0.7 | 3.2 ± 0.7 | 2.5 ± 0.6 | 2.5 ± 0.6 | 7.9 ± 1.1 |
|
|
||||||||
| Tice = 30 K | ||||||||
|
|
||||||||
| 1 | 2.6 ± 0.9 | 4.2 ± 0.9 | 4.5 ± 0.9 | 0.5 ± 0.3 | 4.6 ± 0.9 | 1.0 ± 0.4 | 5.6 ± 0.9 | 0.2 ± 0.2 |
| 2 | 2.9 ± 1.1 | 5.7 ± 0.9 | 4.8 ± 0.9 | 17.0 ± 0.2 | 3.6 ± 0.8 | 2.9 ± 0.7 | 7.5 ± 0.1 | 14.4 ± 1.5 |
| 3 | 1.7 ± 1.2 | 10.0 ± 0.2 | 2.2 ± 0.6 | 10.6 ± 1.3 | 1.4 ± 0.5 | 2.8 ± 0.7 | 2.8 ± 0.6 | 5.2 ± 0.9 |
| 4 | 0.9 ± 0.5 | 3.1 ± 0.8 | 0.3 ± 0.2 | 3.8 ± 0.8 | 0.6 ± 0.3 | 2.5 ± 0.6 | 0.00 | 5.5 ± 0.9 |
| ⟨MLs⟩ | 2.0 ± 0.3 | 5.8 ± 0.3 | 3.0 ± 0.4 | 8.0 ± 0.6 | 2.5 ± 0.6 | 2.3 ± 0.6 | 4.0 ± 0.8 | 6.3 ± 1.0 |
|
|
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| Tice = 60 K | ||||||||
|
|
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| 1 | 8.8 ± 1.0 | 4.8 ± 0.9 | 5.3 ± 0.9 | 11.0 ± 1.3 | 3.9 ± 0.8 | 10.0 ± 1.3 | 3.1 ± 0.7 | 21.5 ± 1.8 |
| 2 | 2.7 ± 1.2 | 4.7 ± 0.9 | 3.2 ± 0.7 | 20.0 ± 1.8 | 3.9 ± 0.8 | 10.8 ± 1.3 | 4.6 ± 0.8 | 15.4 ± 1.5 |
| 3 | 1.5 ± 0.9 | 7.3 ± 1.2 | 3.0 ± 0.7 | 23.5 ± 1.9 | 1.1 ± 0.4 | 2.4 ± 0.6 | 4.1 ± 0.8 | 9.2 ± 1.1 |
| 4 | 0.00 | 0.8 ± 0.5 | 0.3 ± 0.2 | 4.3 ± 0.9 | 0.00 | 1.6 ± 0.5 | 0.00 | 0.9 ± 0.4 |
| ⟨MLs⟩ | 3.3 ± 0.4 | 4.4 ± 0.4 | 2.9 ± 0.3 | 14.0 ± 0.8 | 2.2 ± 0.6 | 6.2 ± 1.0 | 2.9 ± 0.7 | 12.0 ± 1.3 |
Notes. All values should be multiplied by 10-3. The notation H2O∗ and HOD∗ denote photoexcitation of H2O and HDO in H2O ice in which the H atom resulting from photodissociation kicks out a neigbouring H2O molecule. The notation D2O∗ and DOH∗ indicate the analogous process in which the resulting D atom kicks out a neighbouring H2O molecule.
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