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Vibration-rotation pattern in acetylene. II. Introduction of Coriolis coupling in the global model and analysis of emission spectra of hot acetylene around 3 mu m

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Amyay, Badr [Université Libre de Bruxelles] Robert, Séverine [Université Libre de Bruxelles] Herman, Michel [UCL] Fayt, André [UCL] Raghavendra, Balakrishna [Indian Institute of Science] Georges, Robert [Université de Rennes 1]

A high temperature source has been developed and coupled to a high resolution Fourier transform spectrometer to record emission spectra of acetylene around 3 μm up to 1455 K under Doppler limited resolution (0.015 cm−1). The ν3-ground state (GS) and ν2+ν4+ν5 (Σu+ and Δu)-GS bands and 76 related hot bands, counting e and f parities separately, are assigned using semiautomatic methods based on a global model to reproduce all related vibration-rotation states. Significantly higher J-values than previously reported are observed for 40 known substates while 37 new e or f vibrational substates, up to about 6000 cm−1, are identified and characterized by vibration-rotation parameters. The 3 811 new or improved data resulting from the analysis are merged into the database presented by Robert et al. [ Mol. Phys. 106, 2581 (2008) ], now including 15 562 lines accessing vibrational states up to 8600 cm−1. A global model, updated as compared to the one in the previous paper, allows all lines in the database to be simultaneously fitted, successfully. The updates are discussed taking into account, in particular, the systematic inclusion of Coriolis interaction.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2009
Language Anglais
Journal information "Journal of Chemical Physics" - Vol. 131, no. 114301, p. 1-13 (2009)
Peer reviewed yes
Publisher American Institute of Physics ((United States) [New York, etc.])
issn 0021-9606
e-issn 1089-7690
Publication status Publié
Affiliations Université Libre de Bruxelles - Service Chimie Quantique et Photophysique
UCL - SC/PHYS - Département de physique
Indian Institute of Science - Department of Inorganic and Physical Chemistry
Université de Rennes 1 - Institut de Physique de Rennes, Astrochimie Expérimentale
Université de Rennes 1 - Institut de Physique de Rennes, Astrochimie Expérimentale,
Links
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Bibliographic reference Amyay, Badr ; Robert, Séverine ; Herman, Michel ; Fayt, André ; Raghavendra, Balakrishna ; et. al. Vibration-rotation pattern in acetylene. II. Introduction of Coriolis coupling in the global model and analysis of emission spectra of hot acetylene around 3 mu m. In: Journal of Chemical Physics, Vol. 131, no. 114301, p. 1-13 (2009)
Permanent URL http://hdl.handle.net/2078.1/93873