Weinkauf R., Boesl U.
LASER SPECTROSCOPY OF MOLECULAR IONS - THE A-X TRANSITION IN THE
OCS RADICAL CATION
Journal of Chemical Physics. 101(10):8482-93, 1994 Nov 15.
Spectroscopy of the OCS/sup +/ ion in its ground and first excited states has
been performed over a wide energy range using one-photon dissociation
spectroscopy. We used multiphoton ionization in the first step for state
selective ion preparation in single well-defined vibrational and spin-orbit
states. This simplifies the ion spectra of the transition to the first excited A
state considerably and thereover delivers the information of the ion ground
state by using hot ion preparation. For the stretching vibrations
anharmonicities have been observed and for the first overtone of the bending
vibration Fermi resonances have been found. Rotational constants could be
determined for the vibrational ground states of the X and A ionic states in
both spin-orbit components. A new double resonance technique was applied
to measure vibrational frequencies in the ionic X ground state.
Physical chemistry/chemical physics.
Current Contents/Physical, Chemical & Earth Sciences
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