C6H Electronic Spectra and Comparison with Diffuse Interstellar Bands

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C6H Electronic Spectra and Comparison with Diffuse Interstellar Bands

Type: Bachelor thesis
Title: C6H Electronic Spectra and Comparison with Diffuse Interstellar Bands
Author: Zoutendijk, Sebastiaan L.
Issue Date: 2015-07-31
Keywords: hexatriynyl radical
cavity ring-down spectroscopy
pulsed discharge nozzle
Abstract: Diffuse interstellar bands are broad absorption features detected in diffuse interstellar clouds, first discovered almost a century ago. The carriers of these bands have not yet been identified, it is suspected that they are carbon chain radicals or polycyclic aromatic hydrocarbons. This thesis reports on laboratory spectra of C6H, the hexatriynyl radical, and their analysis. It concerns two vibronic bands of the B2Pi-X2Pi electronic transition, the Omega = 3/2 component of the origin band and an unidentified band, for both 12C6H and 13C6H. Molecular parameters for the origin band components and the centres of the unidentified bands' Q branches are determined. All four features are compared to catalogues of known diffuse interstellar bands, none of them matches.
Supervisor: Linnartz, H.V.J.Groenen, E.J.J.
Faculty: Faculty of Science
Department: Physics (Bachelor)
Specialisation: Astronomy and Physics
ECTS Credits: 3
Handle: http://hdl.handle.net/1887/37100
 

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