english  Spectroscopy & Molecular Properties of Ozone
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SECTION CONTENT
Experiment set-up
Introduction
Fourier Transfer Spectrometer
Ozone facilities
Synthetic spectra
Data reduction
Assignment of lines

Experimental set-up

Ozone is prepared by using silent electric discharges (12000 V, 400 Hz) at 77 K. In this case, we convert more than 96% of pure oxygen into ozone. If we make the assumption that only O3 and O2 are present, the pressure of ozone at any instance is given by

PO3 = 2 [Pi - PT]
Pi being the initial pressure of oxygen and PT the total pressure, measured using an MKS Baratron gauge. To verify that only O2 and O3 are present we used the fundamental bands of N218O, C18O, C18O2, H218O and HN18O3 when working on 18O3 molecule (H216O is difficult to quantify as residuals appear in the tank). In conclusion we have observed that the sum of all impurities is lower than 0.3%. Note that the temperature of all the room is controlled at 0.5 C.

More detailed information are in references :

A. Barbe, J.J. Plateaux, S. Bouazza, J.M. Flaud, and C. Camy-Peyret
Spectral properties of ozone in the 5 m region.
J.Q.S.R.T. Vol. 48, No.5/6, pp.599-610 (1992).

A. Barbe, S. Bouazza, J.J. Plateaux, J.M. Flaud and C. Camy-Peyret
Line positions and intensities of the 2v3, v1 + v3 and 2v1 bands of 18O3.
J. Mol. Spectrosc. 150, pp. 255-261 (1991).

S. Mikhailenko, A. Barbe, Vl. G. Tyuterev, L. Regalia and J.J. Plateaux.
Line positions and intensities of the v1 + v2 + 3v3, v2 + 4v3 and 3v1 + 2v2 bands of ozone.
J. Mol. Spectrosc. 180, pp.227-835 (1996).

M.R. de Backer-Barilly and A. Barbe
Absolute intensities of the 10 m bands of 16O3.
J. Mol. Spectrosc. 205, pp.43-53 (2001).