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High Resolution Vib-Rotational Analysis of the v}3 and v}4 Spectral Regions of Chlorine Nitrate



J.- M. Flaud, J Orphal, Walter J. Lafferty, M Birk, G Wagner


High resolution Fourier transform spectra of isotopically natural pure chlorine nitrate, CION02, were recorded with a resolution of 0.00094 cm-1 at temperatures of 190 K and 297 K. An extensive vib-rotational analysis of theV4 and V3 fundamental bands as well as the hot band V4+V9-V9 of the most abundant 35Cl isotopomer was carriedout using the spectrum recorded at 190K. In addition, the cold bands of the lesser abundant 37Cl isotopomer were partially assigned. Accurate upper state rotational Hamiltonian constants were derived. In particular the followingband centers were determined : VO(V4) = 780.2152(4) cm-1, VO(V3) = 809.7504(4) cm-1, VO(V4+v9-v9) = 778.8686(4) cm-' for 778.7226(4) cm-4 for 35CIONO2 and V0(V4) = 778.8686(4)cm-1 for 37 CION02. These constants were used to generate spectral parameters which permit a precise modelling of experimental cross sections of the V4fundamental Q-branch of 35 CION02 over the temperature range of 190-297K and air pressures up to 150 mbar. This Q-branch is used for atmospheric retrievals
Journal of Geophysical Research-Atmospheres
No. D24


band intensity, chlorine, high-resolution spectrum, nitrate, NU4 band, stratospheric reservoir species


Flaud, J. , Orphal, J. , Lafferty, W. , Birk, M. and Wagner, G. (2002), High Resolution Vib-Rotational Analysis of the {v}<sub>3</sub> and {v}<sub>4</sub> Spectral Regions of Chlorine Nitrate, Journal of Geophysical Research-Atmospheres (Accessed May 26, 2024)


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Created November 30, 2002, Updated October 12, 2021