In recent years, highhyphen;resolution photoelectron spectroscopy andabinitiocalculations have considerably revised and enlarged the understanding of the electronic structure of the NO+ion. Based on these results, new potential energy curves for the electronic states of NO+below 24 eV have been constructed and are given here. RKR potentials were calculated from new molecular constants for the eight experimentally wellhyphen;defined states. For the other states, the main features of the potentials were estimated from theoretical calculations and from isoelectronic analogies. A brief review is given of the information on which each potential energy curve is based.
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