ASSIGNMENT OF THE $\nu_{1}$ AND $2\nu_{2}$ BANDS OF $COF_{2}$ AT $5.2 \mu M$

Author Institution: Jet Propulsion Laboratory, California Institute of TechnologyLine positions of the $\nu_{1}$ and $2\nu_{2}$ bands of $COF_{2}$ have been obtained from absorption spectra recorded at $0.0028 cm^{-1}$ resolution using the 1 meter Fourier transform spectrometer located at Kitt Peak National Observatory/National Solar Observatory. Lines have been assigned up to $J' = 68$ and $J'= 52$ for $\nu_{1}$ and $2\nu_{2}$ respectively. The spectra have been fitted using a two band Hamiltonian which treats the Fermi resonance between $\nu_{1}$ and $2\nu_{2}$ exactly and includes centrifugal distortion terms through a complete set of sextic constants for the ground state and the diagonal sextic constants for the excited states. The ground state parameters have been redetermined using additional millimeter and submillimeter transitions measured in our laboratory and fixed for the fitting of the infrared spectra. The molecular parameters and evidence of additional perturbations in the infrared spectra will be discussed