Energies of triplet electronic states of the N2O2+ ion

Abstract

The energies of triplet electronic states of N₂O²⁺ have been measured by double-charge-transfer spectroscopy using OH⁺ and F⁺ as projectile ions. Peaks in the spectra correspond to double-ionization energies of 35.7 ± 0.4, 38.8 ± 0.4, 41.8 ± 0.4 and 43.1 ± 0.4 eV. The lowest energy is identified with the ³Σ^– ground state. The energy of this state was calculated using second-order Møller–Plesset perturbation theory with the 3–21G basis set, and found to be 35.84 eV. The other three measured double-ionization energies can be identified with previously computed triplet-state energies.