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 Title: FT-IR measurements of mid-IR propene (C3H6) cross sections for titan stratosphere Author(s): Sung, Keeyoon Contributor(s): Smith, Mary Ann H.; Mantz, Arlan; Crawford, Timothy J.; Drouin, Brian; Toon, Geoffrey C. Subject(s): Spectroscopy in Atmospheric Chemistry Abstract: We present temperature dependent cross sections of propene (C$_3$H$_6$CH$_2$-CH-CH$_3$, propylene), which was detected in the stratosphere of Titan.\footnote{C. A. Nixon, et al., Astrophys. J. Lett., 776, L14 (2013).} For this study, a series of high-resolution (0.0022 \wn) spectra of pure and N$_2$-mixture samples were recorded at 150 – 296 K in the 650 – 1530 \wn (6.5 – 15.3 $\mu$m) at the Jet Propulsion Laboratory using a Fourier-transform spectrometer and a custom-designed cold cell\footnote{A.W. Mantz, K. Sung, et al. 65th Symposium on Molecular Spectroscopy, Columbus, OH, 2010.}\footnote{K. Sung, A.W. Mantz, et al., J. Mol. Spectrosc. 262, 122 – 134 (2010).}. The observed spectral features cover the strongest band (\nub{19}) with its outstanding Q-branch peak at 912 \wn and three other strong bands: \nub{18}, \nub{16} and \nub{7} at 990, 1442, and 1459 \wn, respectively. In addition, we have generated a HITRAN-format empirical ‘pseudoline list' consisting of line positions, intensities, and effective lower state energies, which were determined by fitting all the observed propene spectra simultaneously. A newly derived partition function was used in the analysis. The results are compared with early work from relatively warm temperatures (278 – 323 K).\footnote{Research described in this talk was performed at the Jet Propulsion Laboratory, California Institute of Technology, Connecticut College, and NASA Langley Research Center under contracts and cooperative agreements with the National Aeronautics and Space Administration.} Issue Date: 2016-06-21 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper/Presentation Type: Text Language: En URI: http://hdl.handle.net/2142/91242 Rights Information: Copyright 2016 by the authors Date Available in IDEALS: 2017-01-26
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