Campargue, A;
Kassi, S;
Yachmenev, A;
Kyuberis, AA;
Küpper, J;
Yurchenko, SN;
(2020)
Observation of electric-quadrupole infrared transitions in water vapor.
Physical Review Research
, 2
, Article 023091. 10.1103/PhysRevResearch.2.023091.
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Abstract
Molecular absorption of infrared radiation is generally due to ro-vibrational electric-dipole transitions. Electric-quadrupole transitions may still occur, but they are typically a million times weaker than electric-dipole transitions, rendering their observation extremely challenging. In polyatomic or polar diatomic molecules, ro-vibrational quadrupole transitions have never been observed. Here, we report the first direct detection of quadrupole transitions in water vapor. The detected quadrupole lines have intensity largely above the standard dipole intensity cut-off of spectroscopic databases and thus are important for accurate atmospheric and astronomical remote sensing.
| Type: | Article |
|---|---|
| Title: | Observation of electric-quadrupole infrared transitions in water vapor |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevResearch.2.023091 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevResearch.2.023091 |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| 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-pp.ucl.ac.uk/id/eprint/10098700 |
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