State-selected studies of the reaction of NH 3+ ( ν1, ν2) with D 2

Abstract

The title reaction has been studied in a guided ion beam instrument at hyperthermal energies, resulting in ion products NH 3D + and NH 2D +. Ammonia ions were prepared with differing amounts of excitation in the in-plane symmetric stretching ( ν 1) and the out-of-plane symmetric bending mode ( ν 2) using 2+1 resonance-enhanced multiphoton ionization. Comparison of the reactivity of two nearly isoenergetic states ( ν 1=0, ν 2=5; internal energy, E int=0.60 eV and ν 1=1, ν 2=2; E int=0.63 eV) with differing concerted atom motions indicates that this reaction is not mode selective.