Elsevier

Nuclear Physics A

Volume 534, Issue 2, 18 November 1991, Pages 403-428
Nuclear Physics A

Mass asymmetric fission barriers for 75Br

https://doi.org/10.1016/0375-9474(91)90509-5Get rights and content

Abstract

Fragments with atomic numbers covering nearly the entire range of the mass-asymmetry coordinate (4 < Z < 27) were observed from the 5.0, 6.2, 6.9, 8.0, 10.2 and 12.7 MeV/A 63Cu + 12C reactions. Energy spectra and angular distributions show the presence of projectile-like and target-like components along with an isotropic component. The isotropic component appears as a Coulomb ring in the invariant cross-section plots indicating the presence of a binary compound nucleus decay which is confirmed by the coincidence data. Excitation functions were constructed for each Z value and a nearly complete set of mass-asymmetric barriers has been extracted for 75Br. There is excellent agreement between the experimentally determined barriers and the finite-range model predictions.

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    This work was supported by the Director, Office of the Energy Research, Office of High Energy and Nuclear Physics, Division of Nuclear Physics, of the US Department of Energy under Contract No. DE-AC03-76SF00098.

    1

    Present address: Institute de Physique Nucleaire, Orsay, France.

    2

    Present address: NSCL, MSU, East Lansing, MI 48844, USA.

    3

    Present address: Institute of Atomic Energy, Beijing, China.

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