Abstract
The ${}^{11}{\stackrel{\ensuremath{\rightarrow}}{\mathrm{Be}}}^{10}\mathrm{Be}+n$ breakup effect on the elastic scattering of ${}^{11}\mathrm{Be}$ by ${}^{12}\mathrm{C}$ at $E/A=49.3$ MeV is investigated by the method of continuum-discretized coupled-channels (CDCC) based on the ${}^{10}\mathrm{B}\mathrm{e}+n+\mathrm{t}\mathrm{a}\mathrm{r}\mathrm{g}\mathrm{e}\mathrm{t}$ three-body model. The CDCC calculation well reproduces the experimental data of the elastic scattering, which is consistent with the result of recent studies based on the adiabatic three-body models. The breakup effect is significant and the coupling to the p-wave continuum states and the d-wave resonance state have a dominant contribution to the breakup effect. Dynamical polarization potential which simulates the breakup effect is evaluated and found to have a weakly repulsive real part and a long-range imaginary part of absorptive nature, characteristic of the weakly bound projectile with neutron halo.
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