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Fourier transform emission spectroscopy of the BΣ-XΣ system of CN |
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| Authors: | RS Ram SP Davis R Engleman PF Bernath |
| Institution: | a Department of Chemistry, University of Arizona, Tucson, AZ 85721, USA b National Optical Observatories, P.O. Box 26732, Tucson, AZ 85732, USA c Department of Chemistry, University of New Mexico, Albuquerque, NM 87131, USA d Canadian Light Source Inc., 101 Perimeter Road, Saskatoon, Canada S7N OX4 e Department of Chemistry, University of Waterloo, Waterloo, Ont., Canada N2L 3G1 |
| Abstract: | The emission spectrum of the B2Σ+-X2Σ+ system of CN has been observed at high-resolution using a Fourier transform spectrometer. The rotational structure of a large number of bands involving vibrational levels v = 0-15 of both electronic states has been analyzed, and improved spectroscopic constants have been determined by combining the microwave and infrared measurements from previous studies. Improved spectroscopic constants for vibrational levels up to v″ = 18 in the X2Σ+ state and v′ = 19 in the B2Σ+ state have been determined by combining the measurements of the 16-13, 18-17, 18-18, 19-15, and 19-18 bands of Douglas and Routly Astrophys. J. Suppl. 1 (1955) 295-318] and 17-14 and 17-16 bands of Ito et al. J. Chem. Phys. 96 (1992) 4195] with our data. The band constants obtained have been used to estimate equilibrium ground state constants for CN. |
| Keywords: | Fourier transform spectroscopy Emission spectroscopy Spectroscopic constants |
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