Alpha-gamma coincidence measurements have been made with reactions of 142-MeV 16 0 on 14e Nd leading to the noncollective nuclei 152 Dy and 151 Dy. The side-feeding pattern in coincidence with forward energetic alpha particles peaks at J = 30 with full width at half maximum ~10, indicating that central collisions do not participate, while that for backward alpha particles extends down to J = 0. The data are consistent with the generalized critical-angular-momentum model of incomplete fusion.

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This is the published version of a paper published in Physical Review A. Atomic, Molecular, and Optical Physics. Citation for the original published paper (version of record): We study the dynamics of Bose-Einstein condensates in symmetric double-well potentials following a sudden change of the potential from the Mott-insulator to the superfluid regime. We introduce a continuum approximation that maps that problem onto the wave-packet dynamics of a particle in an anharmonic effective potential. For repulsive two-body interactions the visibility of interference fringes that result from the superposition of the two condensates following a stage of ballistic expansion exhibits a collapse of coherent oscillations onto a background value whose magnitude depends on the amount of squeezing of the initial state. Strong attractive interactions are found to stabilize the relative number dynamics. We visualize the dynamics of the system in phase space using a quasiprobability distribution that allows for an intuitive interpretation of the various types of dynamics.

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