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Abstract:
We have experimentally and theoretically investigated the mixed-field orientation of rotational-stateselected
OCS molecules and achieved strong degrees of alignment and orientation. The applied
moderately intense nanosecond laser pulses are long enough to adiabatically align molecules.
However, in combination with a weak dc electric field, the same laser pulses result in nonadiabatic
dynamics of the mixed-field orientation. These observations are fully explained by calculations employing
both adiabatic and nonadiabatic (time-dependent) models