UV absorption spectrum of ozone: structure analysis and study of the isotope effect in the Hartley system

Apart from its crucial role in the atmosphere, particularly in filtering solar radiation in the UV wavelength region by absorption in the well known Hartley and Huggins bands, ozone attracts spectroscopic interest regarding the interpretation of these bands. From the results of previous measurements in our laboratory, we have investigated the structures of the Hartley system for two isotopes (16O3 and 18O3). This analysis allows us to propose an absolute assignment and to give two sets of vibrational parameters for the excited electronic state of the two species.