摘要: Abstract High-resolution Fourier transform infrared spectrum of the ν 2 band (1590–1780 cm −1 ) deuterated formaldehyde D CO has been recorded. More than 2500 rovibrational transitions have assigned up to J max = 52 and K a 17. The upper state v 1 ( A was found be perturbed by Δ interaction with 4 state. To explain resonance perturbation in state, some lines 2ν (the center at about 1868 also assigned. Both bands were fitted simultaneously Watson-type rotational Hamiltonian using I r representation reduction, mutual taken into account. As result, parameters eighth order parameter obtained.
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