Fourier transform emission spectroscopy of the A2Π–X2Σ+ (red) system of 13C14N (II)

Abstract

High resolution emission spectra of the A2Π–X2Σ+ transition of 13C14N have been measured in the 15000–24000cm−1 region. Molecules were produced by the reaction of 13CH4 and 14N2 in an active nitrogen afterglow discharge. The spectra were recorded using the Fourier transform spectrometer associated with the McMath-Pierce Solar Telescope of the National Solar Observatory. A rotational analysis of 27 bands involving the excited state vibrational levels v′=9–22 and the ground state vibrational levels up to v″=12 has been obtained. An improved set of spectroscopic constants has been determined for the v=0–22 levels of the A2Π state by combining the present measurements with those reported previously for the v=0–8 vibrational levels of the A2Π state [Ram et al., Astrophys. J. Suppl. Ser. 188 (2010) 500] and existing infrared and millimeter-wave measurements of 13C14N. The 6–3, 7–4, 8–5 and 9–6 bands of the B2Σ+–A2Π transition were also identified in the 23300–24000cm−1 region and were included in the final analysis. An experimental line list and calculated term values are provided.