Coherent control of bimolecular reactions is demonstrated for 3D atom-diatom reactive scattering. In particular, a superposition of initial degenerate ͑yjk͒ diatomic states is used to control reactive integral and differential cross sections in D 1 H 2 ͑yjk͒ ! H 1 HD, where y and j are the vibrational and rotational quantum numbers of a diatom and k is the projection quantum number of the diatom angular momentum onto the initial relative translational velocity vector. Control over the ratio of reactive to nonreactive scattering is extensive. [S0031-9007(98)
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