Infrared Spectra of the OCO and OCO Species of Carbon Dioxide: The Region 500-1500 cm

The effective operator approach is applied to the calculation of the spectra of ¹⁶O¹²C¹⁷O and ¹⁶O¹²C¹⁸O in the far infrared. Using the eigenfunctions of the effective Hamiltonians previously derived for each of these species, parameters of the corresponding effective dipole moment operators have been fitted to more than 400 observed line intensities of cold and hot bands covering the ν₂ and ν₁ spectral regions. New line intensities measurements in the ν₂ band region of ¹⁶O¹²C¹⁸O have been performed. The new observed line intensities have been also included into the corresponding fit. The fittings have been achieved within the experimental errors. A comparison of calculated line parameters with those provided by the HITRAN and GEISA databases is given.