The high-resolution infrared spectrum of CH281BrF has been studied in part of the atmospheric window between 920 and 980 cm-1, the region characterized by the ν9 and v5+v6 absorptions. The v9 emerges as a pseudo a-type band, with selection rule DKa = DKc = 0, +/-2, and v5+v6 exhibits a predominant a-type structure. The interactions connecting these levels and the dark 3v6 state have been explored. The anomalous v9 transitions have been ascribed to Coriolis interaction with v4. The analysis yields a set of accurate upper-state parameters for v9 and v5+v6. Spectroscopic information on 3v6 has been also obtained.
High-resolution rovibrational analysis of CH281BrF in the range 920-980 cm-1
VISINONI, Raffaella;BALDACCI, Agostino;STOPPA, Paolo;
2013-01-01
Abstract
The high-resolution infrared spectrum of CH281BrF has been studied in part of the atmospheric window between 920 and 980 cm-1, the region characterized by the ν9 and v5+v6 absorptions. The v9 emerges as a pseudo a-type band, with selection rule DKa = DKc = 0, +/-2, and v5+v6 exhibits a predominant a-type structure. The interactions connecting these levels and the dark 3v6 state have been explored. The anomalous v9 transitions have been ascribed to Coriolis interaction with v4. The analysis yields a set of accurate upper-state parameters for v9 and v5+v6. Spectroscopic information on 3v6 has been also obtained.
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