Physics – Chemical Physics
Scientific paper
Mar 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jchph..84.3032u&link_type=abstract
Journal of Chemical Physics (ISSN 0021-9606), vol. 84, March 15, 1986, p. 3032-3041. Research supported by the Stichting voor Fu
Physics
Chemical Physics
31
Hydrocarbons, Hyperfine Structure, Laser Induced Fluorescence, Molecular Spectroscopy, Molecular Beams, Spectral Line Width, Stellar Atmospheres
Scientific paper
The CH radical is important as a constituent of stellar atmospheres and as an object for theoretical studies. The present paper is concerned with a molecular beam laser induced fluorescence (LIF) experiment and the first resolution of the hyperfine structure in the C 2 Sigma + state, taking into account also the acquisition of accurate values for the rho-doubling and rotational constants. An anomalous intensity distribution in the LIF signals between transitions to upper (F1) and lower (F2) rho-doublet states in C 2 Sigma + is observed. The spectroscopy of the C 2 Sigma + state is considered along with its lifetime. The investigation shows that the combination of the tunable frequency doubled narrow band laser and the molecular beam technique provides also a powerful approach for the determination of lifetimes of strongly predissociated excited states.
Dymanus A.
Meyer Georges
ter Meulen J. J.
Ubachs Wim
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