# PROGRESS IN THE KNOWLEDGE OF $C_{2}H_{2}$ SPECTROSCOPIC PARAMETERS IN THE IR

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 Title: PROGRESS IN THE KNOWLEDGE OF $C_{2}H_{2}$ SPECTROSCOPIC PARAMETERS IN THE IR Creators: Jacquemart, D.; Rothman, Laurence S.; Dana, V.; Mandin, J.- Y.; Claveau, C.; Valentin, A.; Régalia-Jarlot, L.; Barbe, A. Issue Date: 2003 Publisher: Ohio State University Abstract: The acetylene molecule is important for atmospheric, planetary, and astrophysics applications. In order to improve the knowledge of $C_{2}H_{2}$, systematic measurements of line parameters have been performed. Two main spectral regions have been studied in this work. First, in the $13.6-{\mu}m$ region, line intensities were revisited for the $\nu_{5}$ band and determined for some hot bands, allowing us to update the HITRAN database. Second, in the $5-{\mu}m$ region, numerous line parameters, including positions, intensities, self-broadening coefficients, and self-shifting coefficients of lines belonging to 18 bands were measured for the first time. Intensities were also measured for some new lines in the $4.5-{\mu}m$ region, and a good agreement was observed between previous measurements. Concerning the $3-{\mu}m$ region, where two cold bands were already analyzed for positions and intensities, but where the intensities of numerous hot lines are missing in HITRAN, a study is in progress, and preliminary results will be presented. Description: Author Institution: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division; Laboratoire de Physique Mol\'eculaire et Applications, CNRS, case courrier 76, Universit\'e Pierre-et-Marie-Curie; Groupe de Spectrom\'etrie Mol\'eculaire et Atmosph\'erique, Universit\'e de Reims-Champagne-Ardenne, CNRS URI: http://hdl.handle.net/1811/20954 Other Identifiers: 2003-TA-06