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Tunable diode laser spectra and analysis of the ν3 fundamental of CH279BrF

✍ Scribed by A. Baldacci; P. Stoppa; A. Pietropolli Charmet; S. Giorgianni

Book ID
104151819
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
164 KB
Volume
220
Category
Article
ISSN
0022-2852

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✦ Synopsis

The infrared absorption spectra of CH 2 79 BrF m 3 band have been recorded using a TDL spectrometer in the region 1270-1355 cm À1 , at a resolution of about 0:003 cm À1 . A detailed analysis of the a/b-hybrid band, centered at 1314:2559 cm À1 , with predominant a-type character, has been performed leading to the assignment of about 8500 transitions with K a 6 20 and J 6 95. Excited state perturbation effects, caused by first order c-type Coriolis interaction with the nearby v 5 ¼ 2 state, have been locally observed in different subbands. The analysis of the data was performed using WatsonÕs A-reduced Hamiltonian in the I r representation and Coriolis operators. Parameters up to sextic coefficients for the v 3 ¼ 1 state and the band origin as well as the rotational constants for the v 5 ¼ 2 dark state have been determined along with the coupling terms.

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