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Laboratory Electronic Spectra of Carbon Chains and Rings

Published online by Cambridge University Press:  21 February 2014

L. N. Zack  and
J. P. Maier
L. N. Zack
Affiliation:
Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056, Basel, Switzerland email: [email protected]
J. P. Maier
Affiliation:
Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056, Basel, Switzerland email: [email protected]
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Abstract

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Carriers of the diffuse interstellar bands (DIBs) cannot be definitively identified without laboratory spectra. Several techniques, including matrix isolation, cavity ringdown spectroscopy, resonance enhanced multiphoton ionization, and ion trapping, have been used to measure the electronic spectra of carbon chains and their derivatives. The gas-phase laboratory spectra could then be compared to the astronomical data of known DIBs. The choice of molecules studied in the gas phase depends on the presence of strong electronic transitions at optical wavelengths, the lifetimes of excited electronic states, and chemical feasibility in diffuse astrophysical environments. Collisional-radiative rate models have also be used in conjunction with laboratory spectra to predict absorption profiles under interstellar conditions.

Keywords

astrochemistrymethods: laboratorytechniques: spectroscopicISM: moleculesISM: clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 237 - 246
Copyright
Copyright © International Astronomical Union 2014 

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