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Journal of Quantitative Spectroscopy and Radiative Transfer






Room temperature NH3 absorption spectra recorded at the Kitt Peak National Solar Observatory in 1980 are analyzed. The spectra cover two regions in the visible: 15,200 - 15,700 cm-1 and 17,950 - 18,250 cm-1. These high overtone rotation-vibration spectra are analyzed using both combination differences and variational line lists. Two variational line lists were computed using the TROVE nuclear motion program: one is based on an ab initio potential energy surface (PES) while the other used a semi-empirical PES. Ab initio dipole moment surfaces are used in both cases. 95 energy levels with J = 1 - 7 are determined from analysis of the experimental spectrum in the 5vNH (red) region and 46 for 6vNH (green) region. These levels span four vibrational bands in each of the two regions, associated with stretching overtones.


© 2018 The Authors.

This is an open access article under the Creative Commons Attribution 4.0 International (CC BY 4.0) license.

Data Availability

Data availability: Supplementary material associated with this article can be found, in the online version, at doi: 10.1016/j.jqsrt.2018.02.001.

Original Publication Citation

Zobov, N. F., Coles, P. A., Ovsyannikov, R. I., Kyuberis, A. A., Hargreaves, R. J., Bernath, P. F., Tennyson, J., Yurchenko, S. N., & Polyansky, O. L. (2018). Analysis of the red and green optical absorption spectrum of gas phase ammonia. Journal of Quantitative Spectroscopy & Radiative Transfer, 209, 224-231.