IR-spectra of (CO 2) 2 dimers and collision-induced absorption of carbon dioxide in the region of the fermi doublet (ν 1, 2ν 2)

Abstract

The positions and intensities of all vibrational transitions in the (ν 1, 2ν 2) Fermi doublet region of (CO 2) 2 dimers are obtained by means of variational method. The collision-induced absorption in compressed carbon dioxide is shown to be mainly due to dimeric absorption. Assignment of ν 1 and 2ν 2 vibrational bands in isolated CO 2 molecule is performed by consideration of the symmetries and intensities of dimeric vibrations.