Scattering of the Halo Nucleus Be-11 on Au-197 at Energies around the Coulomb Barrier
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| Authors: | Pesudo, V; Borge, MJG; Moro, AM; Lay, JA; Nacher, E; Gomez-Camacho, J; Tengblad, O; Acosta, L; Alcorta, M; Alvarez, MAG; Andreoiu, C; Bender, PC; Braid, R; Cubero, M; Di Pietro, A; Fernandez-Garcia, JP; Figuera, P; Fisichella, M; Fulton, BR; Garnsworthy, AB; Hackman, G; Hager, U; Kirsebom, OS; Kuhn, K; Lattuada, M; Marquinez-Duran, G; Martel, I; Miller, D; Moukaddam, M; O'Malley, PD; Perea, A; Rajabali, MM; Sanchez-Benitez, AM; Sarazin, F; Scuderi, V; Svensson, CE; Unsworth, C; Wang, ZM |
| Year: | 2017 |
| Journal: | Phys. Rev. Lett. 118 Article Link (DOI) PubMed |
| Title: | Scattering of the Halo Nucleus Be-11 on Au-197 at Energies around the Coulomb Barrier |
| Abstract: | Angular distributions of the elastic, inelastic, and breakup cross sections of the halo nucleus Be-11 on Au-197 were measured at energies below (E-lab = 31.9 MeV) and around (39.6 MeV) the Coulomb barrier. These three channels were unambiguously separated for the first time for reactions of Be-11 on a high-Z target at low energies. The experiment was performed at TRIUMF (Vancouver, Canada). The differential cross sections were compared with three different calculations: semiclassical, inert-core continuum-coupled-channels and continuum-coupled-channels ones with including core deformation. These results show conclusively that the elastic and inelastic differential cross sections can only be accounted for if core-excited admixtures are taken into account. The cross sections for these channels strongly depend on the B(E1) distribution in Be-11, and the reaction mechanism is sensitive to the entanglement of core and halo degrees of freedom in Be-11. |
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