Experiment on recording ozone absorption transitions to 3A2 triplet electronic state by high-sensitivity cavity ring-down spectroscopy in the range 9350-10000 cm-1
S.S. Vasilchenko1,2, O.V. Egorov1,2, V.G. Tyuterev1,2
1National Research Tomsk State University, Tomsk, Russia
2V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: ozone, absorption spectrum, triplet electronic transitions, Wulf bands, cavity ring-down spectroscopy
Abstract
The results of high-sensitivity recording of the Wulf group absorption bands of the ozone molecule in the range 9350-10000 cm-1, which corresponds to transitions from the ground to an excited triplet electronic state, are discussed. The spectrum in this range above the main molecular dissociation threshold was recorded for the first time with the use of a cw-CRDS spectrometer with sensitivity of 1 × 10-10 cm-1 in terms of the absorption coefficient. The measurement technique and the procedure of ozone generation and its concentration monitoring are described. A comparison with the previously calculated theoretical spectra of the 3A2(000) ← X1A1(000), 3A2(010) ← X1A1(000) and 3A2(010) ← X1A1(010) singlet-triplet bands is carried out.
|
