GAS-PHASE ELECTRONIC SPECTRA OF CARBON CHAINS
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Date
1999
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Electronic transitions of carbon chains and their ions are being measured in the gas-phase. The neutral species, such as $C_{n}Hn=6,8,10$, have been observed by cavity ringdown $absorption,^{a}$ whearas the carbon anions by a two photon detachment approach. Comparison is made with astronomical data on diffuse interstellar bands. The case of $C^{-}_{7}$ is $striking;^{b}$ the origin band of the $A^{2}\Pi_{g}\leftarrow X^{2}\Pi_{g}$ transition, as well as the strong vibronic transitions, coincide with DIBs. This provides compelling evidence for the first identification of a carrier.
Description
$^{a}$ H. Linnartz, T. Motylewski and J.P. Maier, J. Chem. Phys., 109, 3819, (1998). $^{b}$ M. Tulej, D.A. Kirkwood, M. Pachkov and J.P. Maier, Astrophys. J., 506, L69, (1998).
Author Institution: Institute of Physical Chemistry, University of Basel
Author Institution: Institute of Physical Chemistry, University of Basel