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Infrared Spectrum of Ozone in the 4600 and 5300 cm−1Regions: High Order Accidental Resonances through the Analysis of ν1+ 2ν2+ 3ν3− ν2, ν1+ 2ν2+ 3ν3, and 4ν1+ ν3Bands

✍ Scribed by A. Barbe; J.J. Plateaux; S. Mikhailenko; Vl.G. Tyuterev

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
334 KB
Volume
185
Category
Article
ISSN
0022-2852

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✦ Synopsis

The very weak bands nu1 + 2nu2 + 3nu3 and 4nu1 + nu3 of 16O3 have been observed for the first time, using the Fourier transform spectrometer (FTS) of Reims and the usual experimental setup providing a large product p x l of approximately 38 Torr x 36 m. The upper levels of these A-type bands which are rather close in energy (they appear respectively at 5291.722 and 5307.790 cm-1) belong to two different sets of interacting polyads. To correctly reproduce the rotation-vibration energy levels and account for the observed perturbations, both bands are treated in a dyad approximation: the (123) state in the Coriolis resonance with the (330) state, and the (401) state in the Coriolis resonance with the (024) state. The assignments of the rotation-vibration levels of the (123) state are confirmed by measurements of line positions of the hot band nu1 + 2nu2 + 3nu3 - nu2 which has also been observed for the first time. The fits are very satisfactory: the r.m.s. deviation for 249 energy levels of the (123) state is 2.4 x 10(-3) cm-1 and is 2.0 x 10(-3) cm-1 for 266 levels of the (401) state. These r.m.s. are near experimental accuracy. Transition moments for the three observed bands are determined from measured line intensities. Copyright 1997 Academic Press. Copyright 1997Academic Press

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