Dynamics of the reaction of N+ with H2. V. Reactive and nonreactive scattering of N+(3P) at relative energies below 3.6 eV

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Abstract
We have measured product velocity vector distributions for the processes N+(3 P)(H2,H)NH+ and N+(3 P)(H2,H2)N+ in the initial relative energy ranges of 0.98–3.60 eV and 0.66–2.50 eV, respectively, using the crossed beam technique. At energies below about 1.9 eV the predominance of a long‐lived NH2 + complex is inferred from isotropic reactive scattering and a backscattered peak in the nonreactive distributions. Above 1.9 eV there is still a substantial interaction between all three atoms. The dynamics are adequately explained by a mechanism which involves accessing the deep 3 B 1 potential well through an avoided crossing with the 3 A 2surface when the symmetry is relaxed from C 2v to C s . The reaction of electronically excited metastable ions, probably N+(1 D), is seen as a forward peak in the reactive distributions.

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