4.4 Article

The ammonia absorption spectrum revisited between 5650 and 6350 cm-1

Journal

MOLECULAR PHYSICS
Volume -, Issue -, Pages -

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/00268976.2023.2256893

Keywords

Ammonia; absorption spectroscopy; near infrared; rovibrational assignment

Ask authors/readers for more resources

This study revisits the ammonia spectrum using high-resolution Fourier transform spectra, providing improved frequency sampling and traceability of measurement conditions. A recommended line list of 5620 transitions is provided for the considered wave number range.
The ammonia spectrum is revisited in the important 1.6 mu m atmospheric transparency window between 5650 and 6350 cm(-1) on the basis of recently recorded high-resolution Fourier transform spectra. These spectra offer an improved frequency sampling and better traceability of the measurement conditions compared to previously studied Kitt Peak spectra (Cacciani et al. J. Quant Spectrosc Radiat Transf 2021; 258:107334. https://doi.org/10.1016/j.jqsrt.2020.107334). Overall, 4812 (NH3)-N-14 lines were measured in the 5650-6350 cm(-1) region corresponding to 4866 transitions including 2066 new ones compared with our previous study, included in the HITRAN2020 database. The energy of 1023 upper state levels (including 107 new ones) was derived from 2608 assigned transitions. Independently, ammonia spectra recorded in a supersonic jet expansion using a tunable extended cavity diode laser allow us to check the absolute transition energies in the 5980-6080 cm(-1) range. Accurate jet spectra calibration was achieved using CH4 reference line positions known with kHz accuracy. The position agreement with the FTS data is within the 4 x 10(-4) cm(-1) uncertainty of the positions measured in the jet expansion. A recommended line list of 5620 transitions is provided for (NH3)-N-14 in the considered 5650- 6350 cm(-1) region. [Graphics] .

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.4
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available