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Fourier transform emission spectroscopy of the B Σ -X Σ (VIOLET) SYSTEM of C N

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DatePublished - 1 Jun 2011
Issue number2
Original languageEnglish


Emission spectra of the B Σ -X Σ transition of C N have been observed at high resolution using the Fourier transform spectrometer associated with the McMath-Pierce Solar Telescope of the National Solar Observatory. The spectra have been measured in the 21000-30000 cm region and a total of 52 vibrational bands involving vibrational levels up to v= 15 of the ground and excited states have been rotationally analyzed to provide a much improved set of spectroscopic constants. An experimental line list and calculated term values are provided. The results of the present analysis should prove useful in the identification of additional C N lines in comets and cool stars, and will help in the determination of the C/ C abundance ratio.

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