Oscillator Strengths And Predissociation Rates For W−x Bands And The 4p5p Complex In 13c16o And 12c18o

Federman, Steven

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https://hdl.handle.net/2142/50841 Copy

Description

Title

Oscillator Strengths And Predissociation Rates For W−x Bands And The 4p5p Complex In 13c16o And 12c18o

Author(s)

Federman, Steven

Contributor(s)

• Joyeux, Denis
• de Oliveira, Nelson
• Smith, Peter L
• Lyons, James R.
• Gavilan, Lisseth
• Heays, Alan
• Stark, Glenn
• Lemaire, Jean Louis
• Eidelsberg, Michele

Issue Date

2014-06-16

Keyword(s)

Astronomy

Abstract

We are conducting experiments on the DESIRS beam-line at the SOLEIL Synchrotron to acquire the necessary data on oscillator strengths and predissociation rates for modeling CO photochemistry in astronomical environments. A VUV Fourier Transform Spectrometer provides a resolving power of about 350,000, allowing us to discern individual lines in electronic transitions. Here we focus on results obtained from absorption spectra of $^{13}$C$^{16}$O and $^{12}$C$^{18}$O for the $W~^1\Pi~-~X~^1\Sigma^+$ bands with $v^{\prime}=0-3$ and $v^{\prime\prime}=0$ and the four overlapping bands (three resolved and one diffuse) observed between 92.97 and 93.35 nm. The three resolved bands are transitions to the upper levels 4p$\pi$(2), 5p$\pi$(0), and 5p$\sigma$(0) of the 4p(2) and 5p(0) complexes, and the diffuse band is associated with a non Rydberg level I $^1\Pi$; weak features in $^{13}$C$^{16}$O are likely associated with absorption to the 4p$\sigma$(2) and II $^1\Pi$ levels. Several perturbations are also revealed in the high-resolution spectra. We compare our results with earlier determinations for these isotopologues of CO, as well as our SOLEIL measurements on $^{12}$C$^{16}$O.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50841

DOI

https://doi.org/10.15278/isms.2014.MF10

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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