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Title:FIRST HIGH RESOLUTION IR SPECTRA OF 1-13C-PROPANE. THE ν9 B-TYPE BAND NEAR 366.404 cm−1AND THE ν26 C-TYPE BAND NEAR 748.470 cm−1. DETERMINATION OF GROUND AND UPPER STATE CONSTANTS.
Author(s):Daunt, S.J.
Contributor(s):Billinghurst, Brant E.; Flaud, Jean-Marie; Lafferty, Walter; Grzywacz, Robert
Subject(s):Planetary atmospheres
Abstract:We report in this talk on the first high resolution IR spectra ($Delta$$nu$ = 0.0009 wn) of the 1-$^{13}$C-Propane isotopologue. Spectra were taken on the Bruker FTS instrument on the Far-IR beamline at the Canadian National Synchrotron (CLS) located at the University of Saskatchewan. The nub{9} B-type band centered near 366.404 wn _x000d_ appears unperturbed and lines were assigned up to K = 17 and J = 50. Since the 1960 MW study of Lidefootnote{Lide, J. Chem. Phys. textbf{33}, p. 1514 ff. (1960)} only used 6 J lines of K = 0 we had to use GSCD analyses to determine a fuller set of molecular constants for this molecule. _x000d_ Since normal propane has been detected using the nub{26} C-type band in Titan and other astrophysical objects our main focus was on the analagous bands for the both the 1-$^{13}$C and 2-$^{13}$C isotopologues. Assigned lines up to K = 17, J = 50 in nub{26} were analyzed with GSCD to independently obtain ground state rotational constants. These were consistent with those obtained from the nub{9} analysis. Upper state constants were also determined that reproduce the vast majority of this band. As in the normal and 2-$^{13}$C species a Coriolis resonance with the 2nub{9} state causes lines of most K levels above 15 to be shifted.footnote{Flaud, Kwabia Tchana, Lafferty & Nixon, Mol. Phys. textbf{108}, p. 699 ff. (2010)} We did not have enough sample available at the time of these experiments to be able to record the 2nub{9} - nub{9} hot band transitions in the low frequency study of nub{9}. _x000d_
Issue Date:6/23/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/96911
DOI:10.15278/isms.2017.FA05
Date Available in IDEALS:2017-07-27


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