Dynamical molecular structure of the NO3 radical : a fundamental NOx molecule

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We have experimentally examined a theoretical proposal made by Stanton on the vibrational assignment and have established the traditional assignment to be correct. We have discovered the angular momenta along the symmetry axis, of the unpaired electron orbital and the degenerate vibrational motions to be coupled strongly, which is a most important vibronic coupling mechanism. We have succeeded in assigning some part of the B-X, 0-0 band, based upon ground-state combination differences of the transition frequencies and Zeeman effects.