Analysis of the ν1+ν3 band of T216O and the ν 1 + ν 3 and 2ν2 + ν3 bands of DT16O

We present the band of TO and the and bands of DTO that have been analysed for the first time using high-resolution infrared spectra of tritiated water vapour. The spectrum for TO has been recorded from a custom-built light-pipe cell at room temperature using a Bruker 125HR Fourier-transform spectro...

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Bibliographic Details
Published in:Molecular physics 2022-08, Vol.120 (15-16)
Main Authors: Hermann, Valentin, Gaisdörfer, Marcel, Erygina, Alina, Lingnau, Philipp, Schlösser, Magnus, Hase, Frank, Orphal, Johannes
Format: Article
Language:English
Subjects:
Fourier transform spectrometers
Infrared analysis
Infrared spectra
Light pipes
Room temperature
Water vapor
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Summary:We present the band of TO and the and bands of DTO that have been analysed for the first time using high-resolution infrared spectra of tritiated water vapour. The spectrum for TO has been recorded from a custom-built light-pipe cell at room temperature using a Bruker 125HR Fourier-transform spectrometer at a resolution of . For the DTO species, an optimised version of the optical cell with 10 times larger maximum activity with regard to previous studies has been employed. For the band of TO, we report 206 new experimental line positions in the range from 4415 to . In the range of 4780–, 356 new experimental line positions of the DTO have been assigned for the band and 161 line positions for the band. The analysis agrees with previous observations showing a systematic shift of the individual line positions compared to the variationally calculated line positions from the Tomsk database. This shift is depending on the rotational quantum number . For each band, the assigned lines were used to determine the spectroscopic constants of the A-reduced Watson-type Hamiltonian.
ISSN:0026-8976
1362-3028
DOI:10.1080/00268976.2022.2097136