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STUDY BY HIGH RESOLUTION FOURIER SPECTROMETRY OF THE $A^{2}\Pi \rightarrow X^{2}\Sigma$ RED SYSTEM OF THE ON MOLECULE EMITTED IN A FLAME
Roger Bacis, D. Cerny, Jean D'Incan, Fancoise Roux, G. Guelachvili
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Abstract
The (0-0) $A^{2}\\Pi \\rightarrow X^{2}\\Sigma$ transition of the CN molecule emitted in a flame was observed near the one micron region with a high resolution Fourier spectrometer. All the observed lines of different bands of the $\\Delta v = -1$, 0 and + 1 sequences are fitted simultaneously. This work shows that the accurate absolute and relative wavenumber and relative intensity measurements that may be expected from Fourier spectroscopy can be used for high precision study of the emission spectra of diatomic molecule electronic transitions. It allows the determination of very small parameters which give an excellent insight into the fine and rotational structures of the two levels