First high resolution IR spectra of 1-13C-propane. The ν9 B-type band near 366.404 cm−1 and the ν26 C-type band near 748.470 cm−1. Determination of ground and upper state constants

Daunt, S.J.

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https://hdl.handle.net/2142/96911 Copy

Description

Title

First high resolution IR spectra of 1-13C-propane. The ν9 B-type band near 366.404 cm−1 and 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

Issue Date

2017-06-23

Keyword(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_

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/96911

DOI

https://doi.org/10.15278/isms.2017.FA05

Copyright and License Information

Copyright 2017 S.J. Daunt

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