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Sub-percent accuracy for the intensity of a near-infrared water line at 10,670 cm^{-1}: experiment and analysis

Rubin, Tom M; Sarrazin, Marian; Zobov, Nikolai F; Tennyson, Jonathan; Polyansky, Oleg L; (2022) Sub-percent accuracy for the intensity of a near-infrared water line at 10,670 cm^{-1}: experiment and analysis. Molecular Physics: An International Journal at the Interface Between Chemistry and Physics , Article e2063769. 10.1080/00268976.2022.2063769. (In press). Green open access

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Abstract

Laser measurements of the intensity of (201) 3_{22} - (000) 2_{21} near-infrared water absorption line at 10,670.1 cm^{-1} are made using three different Herriott cells. These measurements determine the line intensity with an standard deviation below of 0.3% by consideration of the new geometrically derived formula for the optical path length without approximations. This determination together with the current accepted value lead to an overall uncertainty of 0.7% of the experimentally assessed line intensity which is compared with previous ab initio predictions. It is found that steady improvements in both the dipole moment surface (DMS) and the potential energy surface (PES) used in the theoretical studies lead to a systematically better agreement with the observation, with the most recent prediction agreeing closely with the experiment.

Type: Article
Title: Sub-percent accuracy for the intensity of a near-infrared water line at 10,670 cm^{-1}: experiment and analysis
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/00268976.2022.2063769
Publisher version: https://doi.org/10.1080/00268976.2022.2063769
Language: English
Additional information: © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
UCL classification: 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
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10147608
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