Vibrational progressions in the visible and near-ultraviolet absorption spectrum of ozone

In this Letter, we have recorded and analyzed new absorption spectra of ozone (215–2400 nm) at temperatures between 203 and 293 K. Two vibrational progressions have been identified in the visible part of the spectrum between 375 and 505 nm, leading to vibrational assignments, upper stateʹs vibrational frequencies and anharmonic coupling constants, and to an estimation of the vertical electronic energy of the 1B1 state, in overall agreement with recent theoretical predictions and with measurements of isotopic shifts at lower energies that were available in the literature.