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Preparation, collisional decay and transfer of alignment in C2H2 21
Stimulated Raman scattering is used to prepare ensembles of aligned acetylene molecules in thev 2=1 excited vibrational level. Decay and transfer of the alignment is followed by laser induced fluorescence. Measurements of the initially excited alignment agree well with theoretical calculations. The rate constants for decay decrease as the rotational quantum numberJ of the excited level increases.