Title :

High-resolution spectroscopy and analysis of the ν₂ + ν₃ combination band of SF₆ in a supersonic jet expansion

Author(s) :

Boudon, Vincent [Auteur]
Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Asselin, Pierre [Auteur]
Laboratoire de Dynamique Interactions et Réactivité [LADIR]
Soulard, P. [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Goubet, Manuel [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Huet, Therese [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Physique Moléculaire aux Interfaces [PMI]
Georges, Robert [Auteur]
Institut de Physique de Rennes [IPR]
Pirali, O. [Auteur]
Synchrotron SOLEIL [SSOLEIL]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Roy, Pascal [Auteur]
Synchrotron SOLEIL [SSOLEIL]

Journal title :

Molecular Physics

Pages :

2154-2162

Publisher :

Taylor & Francis

Publication date :

2013-05-10

ISSN :

0026-8976

English keyword(s) :

sulphur hexafluoride
greenhouse gas
infrared absorption
supersonic jet expansion
tensorial formalism

HAL domain(s) :

Physique [physics]/Physique [physics]/Agrégats Moléculaires et Atomiques [physics.atm-clus]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]

English abstract : [en]

Sulphur hexafluoride is a very strong greenhouse gas whose concentration is increasing in the atmosphere. It is detected through infrared absorption spectroscopy in the strong ν₃ fundamental region. Due to ...
Show more >Sulphur hexafluoride is a very strong greenhouse gas whose concentration is increasing in the atmosphere. It is detected through infrared absorption spectroscopy in the strong ν₃ fundamental region. Due to the existence of low-lying vibrational states of this molecule, however, many hot bands arise at room temperature and those are still not known. We present here a contribution to the elucidation of this hot band structure, by analysing the ν₂ + ν₃ combination band. We use a supersonic jet expansion high-resolution spectrum at a rotational temperature of ca. 25 K that was recorded thanks to the Jet-AILES setup at the Source Optimisée de Lumière d'Energie Intermédiaire du LURE (SOLEIL) Synchrotron. The simplified structure of this cold spectrum allowed us to assign 444 rovibrational lines and to fit effective Hamiltonian parameters, leading to a very satisfactory spectrum simulation. The parameters obtained in this way allow to calculate the spectrum of the ν₃+ν₂−ν₂ hot band.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL