Isotope Effects on Franck—Condon Factors. V. Electronic Transitions of Isotopic O2, N2, C2, and H2 Molecules

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Abstract
Arrays of Franck—Condon factors for vibrational quantum numbers up to v′ and v″=14 were computed using Morse potentials, for the Schumann—Runge bands of 16O2, 16O18O, and 18O2, for the first positive and the Vegard—Kaplan band systems of 14N2 and 14N15N, for the Swan bands of 12C2 and 12C13C, and for the Lyman bands of H2 and D2. The isotope effects on vibrational transition probabilities are large at the minima between the loci of the Franck—Condon parabolas and smallest at the loci of the maxima.