Extensive analysis of the red system of the CN molecule with a high resolution Fourier Spectrometer

Abstract

The red system of CN molecule emitted by a nitrous oxide-acetylene flame has been measured between 11 000 and 4000 cm −1 with a high resolution Fourier Spectrometer. Fourteen bands of the Δ v = +1, 0, −1, and −2 sequences are reported and analysed. The molecular constants of the 2Π and 2Σ + states are determined using a computer program written to directly reduce the data in a single fit of the whole set of lines, a standard deviation of 0.0025 cm −1 was obtained. Some parameters reflecting small interactions are derived and discussed.