High resolution laser spectroscopy of the ozone molecule at the dissociation threshold
S.S. Vasilchenko1, S. Kassi2, D. Mondelain2, A. Campargue2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Universite Grenoble Alpes, CNRS, Grenoble Alpes, France
Keywords: ozone, O, high resolution spectroscopy, dissociation threshold
Abstract
High sensitivity spectra of the main ozone isotopologue were recorded using a cavity ring-down spectrometer in the region 7920-8670 cm-1 covering the range up to the dissociation threshold and above. The sensitivity on the order 2 × 10-11 cm-1 was achieved. This makes it possible to detect high energy combination bands up to ten vibrational quanta in the electronic ground state. Line positions and intensities are measured for these bands. Vibronic hot bands of the 16O3 borned by transitions from the (100) and (020) electronic ground state levels to the excited 3 A 2 triplet state were recorded for the first time providing new information about the dependence of predissociation broadening on rotational quantum numbers.
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