THE $7.9 \mu m$ BAND OF HYDROGEN PEROXIDE: POSITIONS AND INTENSITIES

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 Title: THE $7.9 \mu m$ BAND OF HYDROGEN PEROXIDE: POSITIONS AND INTENSITIES Creators: Perrin, A.; Flaud, J.- M.; Camy-Peyret, C.; Vallentin, A.; Schriver, L.; Schriver, A.; Arcas, P. H. Issue Date: 1995 Publisher: Ohio State University Abstract: Because the $7.9 \mu m$ band of hydrogen peroxide $(\nu_{6})$ is the strongest infrared band of this molecule, this spectral region is potentially useful for remote sensing of $H_{2}O_{2}$ in the atmosphere. Using new high resolution Fourier transform spectra $(Ft 0.002 cm^{-1})$ recorded in the $1190-1340 cm^{-1}$ spectral region, it has been possible to extend the $analysis^{(1)}$ of the $\nu_{6}$ band of $H_{2}O_{2}$ leading to an improved analysis of the $(n,\top) = (0,1), (1,1), (2,1), (0,3), (1,3)$ torsional subbands. In addition to the $(\Delta r= \pm 1, \Delta K_{a} = \pm 2)$ torsion-rotation resonances within the $\nu_{6} = 1$ vibrational state, which are usually observed for $H_{2}O_{2}$, the energy level calculation takes into account the $\nu_{2} = 1 \leftrightarrow \nu_{6} =1, \nu_{3} =1 \leftrightarrow \nu_{6} =1$ and $\nu = 0 \leftrightarrow \nu_{6} = 1$ vibration-rotation resonances. In this way an excellent agreement was obtained for the $\top = 3$ torsion-rotation levels. On the other hand, for the $\top=1$ torsion-rotation levels the agreement was less satisfactory because in this case the scheme of vibration-torsion-rotation resonances is much more complicated. Finally line intensities were measured and satisfactorily reproduced, and a synthetic spectrum of the $\nu_{6}$ band of $H_{2}O_{2}$ was generated. Financial support from the European Community under contract EV5V-CT92-0076 is gratefully acknowledged. Description: I. A. Perrin, J. -M. Flaud, C. Camy-Peyret, A. Goldman, F.J. Murcray, and R.O Blatherwick, J. Mol. Spectrosc. 142 129-147 (1990). Author Institution: Université Pierre et Marie Curie, Tour 13, bte 76, 4 Place Jussieu, F-75252 PARIS, Cedex 05, France URI: http://hdl.handle.net/1811/29492 Other Identifiers: 1995-MG-12