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The υ1 fundamental bands of trans- and cis-DONO studied by high-resolution Fourier-transform spectroscopy |
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| Authors: | A Dehayem-Kamadjeu J Orphal I Kleiner J-M Flaud |
| Institution: | a Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), CNRS UMR 7583 et Universités Paris 7 et Paris 12, 61 av. du Général de Gaulle, 94010 Créteil, Cédex, France b Centre de Physique Atomique Moléculaire et Optique Quantique (CEPAMOQ), Faculté des Sciences, Université de Douala, Cameroun c Université de Ngaoundéré, Faculté des Sciences B.P 454 Ngaoundéré, Cameroun |
| Abstract: | The absorption spectrum of deuterated nitrous acid DONO in the region from 2350 to 3000 cm−1 has been recorded at a resolution of 0.003 cm−1 using a Fourier-transform spectrometer. For the first time, 1366 a- and b-type transitions in the υ1 fundamental band of trans-DONO and 741 b-type transitions in the υ1 fundamental band of cis-DONO have been assigned. Rotational and centrifugal distortion constants up to sextic order were determined for the v1 = 1 states of trans- and cis-DONO using non-linear least-squares calculations. Synthetic spectra calculated using the new rovibrational constants obtained for both species reproduce the observed spectra very well. In addition, the infrared transitions of this study were used, together with previously published pure rotational transitions, to determine improved rotational and centrifugal distortion constants of the ground states of trans- and cis-DONO. |
| Keywords: | Deuterated nitrous acid DONO Deuterated species Infrared Vibrational spectra High resolution Line positions |
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