Analysis of Fourier Transform Jet Emission Spectra of CN (B2￠2+??X2￠2+)

摘要

The CN radical was generated in a jet with an inert buffer gas, helium from high voltage dc discharge of the precursor CH3CN. The Fourier transform emission spectra of the O-O band of the B2⒉+℃X2⒉+ transition of CN have been obtained with a Bruker IFS-120HR spectrometer. The spectra show an anomalous distribution of rotational intensity which cannot be explained by a simple Boltzmann distribution. The analysis of the transition frequencies provides molecular constants with high accuracy for both the ground and the excited electronic states of the CN radical.