Abstract

The unimolecular dissociation process N+4 → N+2+N2 was investigated with a double focusing sector field mass spectrometer. N+4 was produced by electron impact ionization of N4 present in a free jet expansion. Besides collision induced dissociation, the existence of a metastable dissociation process with a decomposition rate of about 102 s−1 was demonstrated. The occurrence of this metastable process is interpreted using the results of quantum mechanically calculated potential energy curves of N2–N+2.

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