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Table 3
Branching ratio between H2O photodissociation leading to OH through the à state (λ ≳ 143 nm) and the 
state (114 ≲ λ ≲ 143 nm) for UV radiation fields of various spectral shapes.
| Radiation field | Ã |  |
|---|---|---|
| Ly α | 0% | 100% |
| T Tauri | 13% | 87% |
| ISRF | 46% | 54% |
| Blackbody 1000 K | 82% | 18% |
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