Abstract
The emission spectrum of the B-2 Sigma(+) - X-2 Sigma(+) 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 upsilon = 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 upsilon" = 18 in the X-2 Sigma(+) state and upsilon' = 19 in the B-2 Sigma(+) 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. (C) 2006 Elsevier Inc. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 225-231 |
| Number of pages | 7 |
| Journal | JOURNAL OF MOLECULAR SPECTROSCOPY |
| Volume | 237 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jun 2006 |
Keywords
- Fourier transform spectroscopy
- emission spectroscopy
- spectroscopic constants
- TAIL BAND SYSTEM
- ROTATIONALLY INELASTIC-COLLISIONS
- MICROWAVE BACKGROUND TEMPERATURE
- DIFFUSE INTERSTELLAR CLOUDS
- RED SYSTEM
- MOLECULAR-CONSTANTS
- DIATOMIC-MOLECULES
- LASER SPECTROSCOPY
- INFRARED-SPECTRUM
- ELECTRONIC-STATE