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dc.creatorMoazzen-Ahmadi, N.en_US
dc.creatorHwang, C. H.en_US
dc.creatorTokaryk, D. W.en_US
dc.date.accessioned2007-11-20T17:10:25Z
dc.date.available2007-11-20T17:10:25Z
dc.date.issued1995en_US
dc.identifier1995-RJ-05en_US
dc.identifier.urihttp://hdl.handle.net/1811/29689
dc.description1. H. Sasada, T. Amano, C. Jarman, and P. F. Bernath, J. Chem. Phys. 94, 2401 (1991). 2. A. M. Smith, J. Agreiter, C. Engel, and V. E. Bondybey, Chem. Phys. Lett. 207, 531 (1993).en_US
dc.descriptionAuthor Institution: University of Lethbridge, Lethbridge, Alberta TIK 3M4, Canada.; National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada.en_US
dc.description.abstractThe lowest-lying electronically excited state of $C_{3}$, denoted $\tilde{a}{^{3}\Pi_{u}}$ is metastable because its decay to the singlet ground state is spin forbidden. This work reports the observation of a gas-phase infrared absorption spectrum between 1428 and $1473 cm^{-1}$ which is assigned to the $V_{3}$ fundamental band of the $\tilde{a}{^{3}\Pi_{u}}$ state. Metastable $C_{3}$ was produced in flowing mixtures of helium and acetylene discharged in a methanol-cooled hollow cathode cell, and the resulting plasma was probed with an infrared diode laser source. The observed band consists of three R and three P branches, which show staggering due to A-type doubling effects and nuclear spin statistics. Since the lower level has been observed previously in the (000)-(000) band of the $\tilde{b}{^{3}\Pi_{g}} - \tilde{a}{^{3}\Pi_{u}}$ electronic $transition,^{1}$ unambiguous rotational numbering of the new spectrum could be made by comparing lower state combination differences. The band origin, near $1450 cm^{-1}$, is close to the value of $1455.3 cm^{-1}$ determined previously from matrix-isolation $experiments.^{2}$en_US
dc.format.extent61971 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleINFRARED DIODE LASER SPECTROSCOPY OF TRIPLET $C_{3}$: THE $\nu_{3}$ BAND OF THE $\tilde{a}{^{3}\Pi_{u}}$ ELECTRONIC STATEen_US
dc.typearticleen_US


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