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Published online by Cambridge University Press: 14 August 2015
On the evidence of some recent laboratory data for the association reaction H + OH + He → H2O + He, and following previously proposed ion-neutral association reaction schemes, we tentatively suggest that the radiative association reaction of H and OH can be a significant mechanism for the production of H2O in interstellar clouds, when compared with the ion-neutral reaction sequence. The ‘H-atom + radical’ association process may be of some general importance in the production of other small molecules in interstellar clouds.