Abstract

Abstract High-resolution translational-energy spectroscopy (up to 0.1 eV) has been carried out on 8 V beams of NO − and NO 2− . Several features in the spectrum of NO 4 are assigned to the transitions within the triplet manifold of this ion. The observed transitions originate in several excited electronic states, indicating long lifetimes (> 10 μs) for the states involved. Two electronic transitions in NO 2 ' have been observed at low energies which are attributed to excitations to the first two excited states of this ion.

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