Phys. Rev. Lett. 82, 4212–4215 (1999)Missing Bands in the Multiphoton Excitation of Coupled Molecular StatesReceived 7 October 1998; published in the issue dated 24 May 1999 Measurements are reported of (3+1) resonance-enhanced multiphoton ionization of O2 via the F3Πu state which show near-vanishing intensity for F-X(1,0), the strongest band in one-photon spectra. Using a coupled-channel treatment of the 3Πu Rydberg-valence interactions, this dramatic result is attributed to destructive interference between the amplitudes for transitions into the Rydberg and valence components of the heavily mixed F state, indicating a significant dependence of the relative transition amplitudes on the mode of excitation. Thus, “missing bands” in the multiphoton spectra of coupled states provide important information on relative multiphoton transition probabilities. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.4212
DOI:
10.1103/PhysRevLett.82.4212
PACS:
33.80.Rv, 33.20.Ni, 33.70.Fd
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