Role of a high ground-state centrifugal barrier in the breakup of the 31Ne nucleus |
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| Authors: | B Mukeru |
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| Affiliation: | 1. Department of Physics, University of South Africa, P. O. Box 392, Pretoria 003, South Africa |
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| Abstract: | An analysis of the breakup of the \begin{document}$ ^{31}{\rm Ne} $\end{document}![]() ![]() weakly-bound neutron-halo system on a lead target is presented, considering the \begin{document}$ 2p_{3/2} $\end{document}![]() ![]() and \begin{document}$ 1f_{7/2} $\end{document}![]() ![]() ground-state configurations. It is shown that a high centrifugal barrier almost wipes out the breakup channel, thus assimilating the breakup of a weakly-bound system to that of a tightly-bound system, and also reduces the range of the monopole nuclear potential. Consequently, a high centrifugal barrier prevents the suppression of the Coulomb-nuclear interference (CNI) peak by weakening couplings to the breakup channel and reducing the range of the monopole nuclear potential, two main factors that would otherwise suppress such a peak. The present study also identifies couplings to the breakup channel and a long-ranged monopole nuclear potential as the main factors that lead to the suppression of the CNI peak. A low centrifugal barrier together with a Coulomb barrier would also effectively prevent the suppression of the CNI peak in proton-halos as reported in the case of the \begin{document}$ ^8{\rm B} $\end{document}![]() ![]() proton-halo. |
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| Keywords: | centrifugal barrier Coulomb-nuclear interference peak elastic scattering cross section |
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