Elastic scattering angular distributions of neutron halo nucleus 11Be studied via dynamic polarization potentials

Cluster aspects of the nuclear structure manifest themselves in, among many other types of nuclear reactions, the breakup reactions of weakly-bound nuclei and their couplings with the other reaction channels. In the present work we analyzed the breakup coupling effects to the elastic scattering angular distributions of Be-11 with a Pb-208 target at an incident energy of 140 MeV. Weighted mean local polarization potentials (WMLPPs), which mimic the dynamic polarization potentials (DPPs) induced by the breakup coupling effects to the elastic scattering channel, were obtained from continuum discretized coupled channel (CDCC) calculations. Suppression of the Coulomb-nuclear interference peaks (CNIPs) of the elastic scattering angular distributions is found to be caused by the destructive interference between the Coulomb and the Coulomb-distorted nuclear amplitude due to the WMLPPs. Comparisons between the WMLPPs and the theoretically calculated Coulomb dipole polarization potentials (CDPPs) suggest that the breakup coupling effect of the Be-11+Pb-208 system cannot be represented by the CDPPs alone.

Automated summary

The study analyzed the effects of breakup reactions of Be-11 with a Pb-208 target on the elastic scattering angular distributions, revealing a suppression of the Coulomb-nuclear interference peaks. The weighted mean local polarization potentials obtained from continuum discretized coupled channel calculations were found to mimic the dynamic polarization potentials induced by the breakup coupling effects. Comparisons between the weighted mean local polarization potentials and the theoretically calculated Coulomb dipole polarization potentials suggested that the breakup coupling effect of the Be-11+Pb-208 system cannot be fully represented by the Coulomb dipole polarization potentials alone.