Elsevier

Nuclear Physics A

Volume 471, Issues 1–2, 7 September 1987, Pages 131-148
Nuclear Physics A

The angular momentum dependence of complex fragment emission

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Abstract

Large fragment (A>4) production at high angular momentum is studied via the reaction, 200 MeV 45Sc + 65Cu. Comparisons of the fragment yields from this reaction (high angular momentum) to those from 93Nb + Be (low angular momentum) are used to verify the strong angular momentum dependence of large fragment production predicted by equilibrium models. Details of the coincident γ-ray distributions not only confirm a rigidly rotating intermediate but also indicate that the widths of the primary L-wave distributions decrease with increasing symmetry in the decay channel. These data are used to test the asymmetry and L-wave dependence of emission barriers calculated from a rotating, finite range corrected, liquid drop model.

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This work was supported in part by the U.S. Department of Energy under contracts DE-AC02-86ER40210, DE-AS02-76ER04052, and DE-AC05-840R21400.

One of us (L.G.S.) is pleased to acknowledge support from a U.S. Presidential Young Investigator Award. Oak Ridge National Laboratory is operated by Martin Marietta Energy Systems Inc.

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