Observation of the ν6 + ν9 Band of Ketene via Resonant Coriolis Interaction with ν8

✍ Scribed by Martin Gruebele; John W.C. Johns; László Nemes

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 98 KB
• Volume: 198
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1999.7956

✦ Synopsis

We observed and analyzed a b-axis Coriolis resonance between higher J states of the nu(6) + nu(9) combination band and the nu(8) fundamental of ketene in the spectral region 940-970 cm(-1). The interaction resonantly couples K(a) = 1 states of the combination band to K(a) = 0 states of the fundamental and also affects K(a) = 1, 2 states in the fundamental. Due to the involvement of strongly asymmetry-split low K levels, the rotational constants and band origin of nu(6) + nu(9) could be accurately determined and are discussed in the light of high-quality anharmonic force fields. The Coriolis coupling parameter, zeta(b)(8,6+9), is very precisely determined. A smaller perturbation, which could not be fully analyzed, is tentatively attributed to K(a) = 2 upper states in the nu(5) + nu(9) band. Copyright 1999 Academic Press.