Frankcombe, Terry; Nyman, Gunnar
In this work we study hydrogen isotope fractionation along the proposed gas-phase ammonia formation pathway at temperatures relevant to interstellar modelling. Specifically we study the isotopically substituted variants of the NH+ + H2 reaction, for which the primary product is NH2+ + H. Adiabatic capture theory calculations have been performed for the association reaction. A new potential-energy surface has been determined for the NH2+ product. An extensive set of rovibrational energy levels...[Show more]
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