Gas-phase spectroscopy of the 2 3Sigma(-)-X 3Sigma- electronic transition of CCS

The Journal of Chemical Physics
Masakazu NakajimaYasuki Endo

Abstract

Gas-phase laser excitation spectra of the jet-cooled CCS radical were observed for the 2 (3)Sigma(-)-X (3)Sigma(-) electronic transition in a discharge of a gas mixture containing acetylene and H(2)S in Ar. The observed excitation spectra show complicated rotational structures, consisting of a much larger number of rotational lines than those expected for this size of linear molecule. The excited vibronic levels emit fluorescence, the lifetime of which is much longer than that estimated theoretically, indicating that the upper levels are strongly mixed with many "dark" background levels. Dispersed fluorescence spectra from single vibrational levels of the 2 (3)Sigma(-) state show long progressions of the C-S stretching mode, enabling observations of many vibrational levels in the ground electronic state.

References

Dec 3, 2008·The Journal of Chemical Physics·Etienne GarandDaniel M Neumark

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Citations

May 3, 2013·The Journal of Chemical Physics·Masakazu NakajimaYasuki Endo
Jan 7, 2014·The Journal of Chemical Physics·Masakazu Nakajima, Yasuki Endo

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Methods Mentioned

BETA
Fluorescence
irradiates

Software Mentioned

MOLPRO
MODR
CCS

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