Study Of The Perturbed W 1π(v=1) State Of Co In Five Isotopologues

Heays, Alan

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https://hdl.handle.net/2142/50919 Copy

Description

Title

Study Of The Perturbed W 1π(v=1) State Of Co In Five Isotopologues

Author(s)

Heays, Alan

Contributor(s)

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

Issue Date

2014-06-16

Keyword(s)

Astronomy

Abstract

As part of a series of new photoabsorption measurements of CO isotopologues in the vacuum-ultraviolet at the SOLEIL synchrotron, we have studied the $v=1$ level of the $W\,{}^1\Pi$ Rydberg state. This state is crossed by an unknown perturber that strongly influences the predissociation rate of $W\,{}^1\Pi$ rotational levels. A detailed multi-isotopologue study of this interaction reveals the molecular constants of the interacting species and gives clues to its identity. Our measurement program has astrophysical applications in mind, with CO photodissociation being a critical step in the photochemistry of interstellar clouds, protoplanetary disks, and (exo)planetary atmospheres. The careful analysis of perturbations such as this and other weak features in the spectrum of CO give critical information regarding the electronic structure of the molecule. Illuminating this structure will help translate laboratory measurements to astrophysically-relevant cross sections and predissociation rates, and is itself an interesting problem in molecular physics.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50919

DOI

https://doi.org/10.15278/isms.2014.MF11

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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