title: The Coriolis Interaction between the nu(9) and nu(7) Fundamental Bands of Methylene Fluoride.
abstract: The infrared spectrum of the nu(7) and nu(9) bands of methylene fluoride-d(2) (CD(2)F(2)) has been recorded with an unapodized resolution of 0.0024 cm(-1) in the frequency range of 940-1030 cm(-1) using the Fourier transform technique. A weak b-type Coriolis interaction term was found to couple these two vibrational states with band centers about 42 cm(-1) apart. By fitting a total of 1031 infrared transitions of both nu(7) and nu(9) with a standard deviation of 0.0011 cm(-1) using a Watson's A-reduced Hamiltonian in the I(r) representation with the inclusion of a b-type Coriolis resonance term, two sets of rovibrational constants for nu(7) = 1 and nu(9) = 1 states up to sextic order were derived. The nu(7) band is C type, while the nu(9) band is A type with band centers at 961.8958 +/- 0.0005 and 1003.7421 +/- 0.0001 cm(-1), respectively. Copyright 2000 Academic Press.
authors.affiliation: Department of Physics, Faculty of Science, National University of Singapore, Lower Kent Ridge Road, 119260, Singapore
authors.initials: KL
authors.lastname: Goh
authors.initials: TL
authors.lastname: Tan
authors.initials: PP
authors.lastname: Ong
authors.initials: HH
authors.lastname: Teo