Down, MJ;
Hill, C;
Yurchenko, SN;
Tennyson, J;
Brown, LR;
Kleiner, I;
(2013)
Re-analysis of ammonia spectra: Updating the HITRAN 14NH3 database.
Journal of Quantitative Spectroscopy and Radiative Transfer
, 130
pp. 260-272.
10.1016/j.jqsrt.2013.05.027.
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Abstract
The data incorporated in the HITRAN database for 14NH3 are analyzed using a comprehensive and consistent set of quantum numbers, empirical lower energy levels and the BYTe variationally calculated line list as reference points. Labelings are checked to ensure that they obey both the usual selection rules and the HITRAN labeling formalisms; the problems identified are corrected where possible. Further assignments are brought into question by combination difference (CD) checking of implied upper energy levels. The CD analysis yields an 89% complete 14NH3 energy level list up to 6610 cm−1 and J=21, self-consistent to 0.1 cm−1. In combination with the 1723 previously unassigned and unlabeled lines in HITRAN a total of 2529 problem lines were identified for re-analysis. The compiled energy level list was used to label and assign the set of problem transitions, resulting in a total of 249 new assignments and a further 368 new labelings. Assignment by comparison with the reference line list resulted in 111 further new line assignments and 14 new labelings. Intensities are checked against recent measurements and BYTe. New intensities are proposed for the ν2ν2 band with new intensities and line positions for the 2ν2−ν22ν2−ν2 and new line lists are created for the ν2−ν2ν2−ν2, ν2−ν4ν2−ν4 and ν4−ν4ν4−ν4 bands. BYTe band intensities are analyzed to identify other regions of missing intensity.
| Type: | Article |
|---|---|
| Title: | Re-analysis of ammonia spectra: Updating the HITRAN 14NH3 database |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jqsrt.2013.05.027 |
| Publisher version: | http://dx.doi.org/10.1016/j.jqsrt.2013.05.027 |
| Language: | English |
| Additional information: | © 2013 Elsevier B.V. except certain content provided by third parties. ScienceDirect® is a registered trademark of Elsevier B.V. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY-NC-ND), which permits distribution. You may not use this work for commercial purposes or alter, transform, or build upon this work. The original author and source must be credited. |
| Keywords: | Ammonia, Line assignments, Atmospheric physics, Planetary atmospheres |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1399212 |
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