Fourier Transform Observation of Jet Cooled Emission from the $CH_{3}N$ and CCN radicals

Author Institution: Advanced Research in Energy Storage, Air Force Astronautics Lab./LSX; Department of Chemistry, University of ArizonaAn improved spectrum of the methyl nitrene radical has been obtained in emission from a corona excited supersonic expansion. Use of a slot nozzle reduces the Doppler broadened linewidth from $0.2 cm^{-1}$ to $0.07 cm^{-1}$. All of the sub-bands in the $O_{0}^{0}$ band of the $\bar{A}^{3}E-\bar{X}^{3}A_{2}$ system can now be assigned. A rotational analysis using a full $^{3}E-^{3}A$ Hamiltonian will be presented. Jet cooled emission from the $\bar{A}^2\Delta - \bar{X}^{2}\Pi$ system of CCN has also been recorded, using the Kitt Peak Fourier transform spectrometer. Emission to the 001, 002, and 100 levels of the $\bar{X}^{2}\Pi$ state provides direct gas phase values for the CCN stretching fundamentals