FIRST HIGH RESOLUTION IR SPECTRA OF 2-13C-PROPANE. THE ν9 B-TYPE BAND NEAR 366.767 cm−1AND THE ν26 C-TYPE BAND NEAR 746.615 cm−1. DETERMINATION OF GROUND AND UPPER STATE CONSTANTS.

Daunt, S.J.

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https://hdl.handle.net/2142/96804 Copy

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Title

FIRST HIGH RESOLUTION IR SPECTRA OF 2-13C-PROPANE. THE ν9 B-TYPE BAND NEAR 366.767 cm−1AND THE ν26 C-TYPE BAND NEAR 746.615 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

6/23/2017

Keyword(s)

Planetary atmospheres

Abstract

This is the first report in a project to record high resolution IR data of the $^{13}$C and D substituted isotopologues of propane._x000d_ _x000d_ In this talk we will give details on the first high resolution ($Delta$$nu$ = 0.0009 wn) IR investigation of 2-$^{13}$C-propane. Spectra of the CCC skeletal bending mode near 336.767 wn (B-type) and the wagging mode near 746.615 wn (C-type) were recorded using the FTS on the Far-IR beamline of the Canadian Light Source (CLS). The spectra were assigned both traditionally and with the aid of the PGOPHER program of Colin Western.footnote{C. Western, J. Quant. Spectrosc. & Rad. Transf. textbf{186}, 221 ff. (2017).} The only available MW data on this molecule are the six K =0 J lines from Lide.footnote{Lide, J.Chem. Phys. textbf{33}, p.1514ff. (1960).} We therefore had to use the present data to determine a new set of ground state constants that included centrifugal distortion terms for this molecule. We compare these experimentally determined values with the recent textit{ab initio} values of Villa, Senent & Carvajal.footnote{Villa, Senent & Carvajal, PCCP textbf{15}, 10258 (2013).} Upper state constants for both bands have been found that provide a good simulation of the spectra. The hope is that this data will be useful in identifying isotopic propane lines in Titan and other astrophysical objects._x000d_

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

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http://hdl.handle.net/2142/96804

DOI

10.15278/isms.2017.FA04

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