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

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.