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Deperturbation study of the state of C2 by applying degenerate and two-color resonant four-wave mixing

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Title: Deperturbation study of the state of C2 by applying degenerate and two-color resonant four-wave mixing
Authors: Bornhauser, P.1, Knopp, G.1, Gerber, T.1, Radi, P.P. peter.radi@psi.ch
Source: Journal of Molecular Spectroscopy. Aug2010, Vol. 262 Issue 2, p69-74. 6p.
Subjects: Quantum perturbations, Spectrum analysis, Least squares, Coupling constants, Particles (Nuclear physics), Molecular spectroscopy
Abstract: Abstract: The potential of four-wave mixing spectroscopy in combination with a discharge slit-jet source is explored by performing an analysis of the perturbations occurring between vibronic levels of the and states of C2. Unambiguous assignments of perturbed transitions are achieved by intermediate level labeling in the state of the Swan system and results in the re-assignment of several line positions found in the literature. Furthermore, extra transitions are observed and assigned in a straightforward manner that originate from the perturbing electronic state. Significantly perturbed rotational transitions in the (4,3) band of the Swan system are reported for the first time. A least-squares fit to 35 perturbed and perturbing transitions yields the vibronic origin, rotational and spin-spin coupling constant of the state as well as the spin-orbit and L-uncoupling parameters for the interaction between the and states. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Abstract: The potential of four-wave mixing spectroscopy in combination with a discharge slit-jet source is explored by performing an analysis of the perturbations occurring between vibronic levels of the and states of C2. Unambiguous assignments of perturbed transitions are achieved by intermediate level labeling in the state of the Swan system and results in the re-assignment of several line positions found in the literature. Furthermore, extra transitions are observed and assigned in a straightforward manner that originate from the perturbing electronic state. Significantly perturbed rotational transitions in the (4,3) band of the Swan system are reported for the first time. A least-squares fit to 35 perturbed and perturbing transitions yields the vibronic origin, rotational and spin-spin coupling constant of the state as well as the spin-orbit and L-uncoupling parameters for the interaction between the and states. [ABSTRACT FROM AUTHOR]
ISSN:00222852
DOI:10.1016/j.jms.2010.05.008