title: The Huggins band of ozone: assignment of hot bands.
abstract: The "hot bands" of the Huggins band of ozone are assigned, in both the 218 K and the 295 K spectrum. The assignment is based on intensities calculated with three-dimensional vibrational wave functions for the electronic ground state (X) and the excited state (B). The hot-band structures in the 218 K spectrum all can be assigned to transitions starting from vibrational states with one quantum of stretching excitation in the ground electronic state. The 295 K spectrum shows new structures, which are due to transitions originating from vibrational states in the X state with two quanta of excitation of the stretching modes--despite very small Boltzmann factors. All structures in the low-energy range of the 295 K spectrum, even the very weak ones, thus can be uniquely interpreted. The significance of hot bands results from the strong increase of Franck-Condon factors with excitation of the stretching modes in both the lower and/or the upper electronic states, whose equilibrium bond lengths differ significantly.
authors.affiliation: Max-Planck-Institut für Strömungsforschung, D-37073 Göttingen, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Zhu
authors.forename: Z-W
authors.initials: ZW
authors.lastname: Qu
authors.forename: S Yu
authors.initials: SY
authors.lastname: Grebenshchikov
authors.forename: R
authors.initials: R
authors.lastname: Schinke
authors.forename: J
authors.initials: J
authors.lastname: Malicet
authors.forename: J
authors.initials: J
authors.lastname: Brion
authors.forename: D
authors.initials: D
authors.lastname: Daumont