Fig. 3

Efficiencies for the formation of OH and H2O in high-density gas (n = 105.5 cm-3), in atomic and molecular dominated gas. UV fields ranging from G0 = 103 to 106 are considered. Results from rate equations are shown by a solid line for OH and a dotted line for H2O. The analytical fit is shown by the crosses (OH) and diamonds (H2O).
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