Experimental rovibrational populations of CO up to ν = 40 from doppler-limited fourier spectra of the sequences Δν = 1, 2 and 3 emitted by a laser type source

Abstract

High-resolution emission Fourier spectra have been recorded from a CON 2HeO 2 mixture excited by dc discharge and cooled by liquid nitrogen. Intensities of all the observed rovibrational lines belonging to sequences Δν = 1, 2 and 3 of 12C 16O and 13C 16O, and Δν = 1 of 12C 16O, have been measured. The data treatment is described. Accurate determination of the rotational distribution and of the vibrational populations of the three isotopic species is performed. The Δν = 2 and 3 vibrational radiative transition probabilities, versus the Δν = 1 ones, are also given, up to ν = 40.