Fernandez-Garcia, J. P.; Cubero, M.; Rodriguez-Gallardo, M.; Acosta, L.; Alcorta, M.; Alvarez, M. A. G.; Borge, M. J. G.; Buchmann, L.; Diget, C. A.; Falou, H. A.; Kanungo, Rituparna (IOP Publishing Limited, 2014)
We present a study of <sup>11</sup>Li+<sup>208</sup>Pb collisions at energies around the Coulomb barrier (E<sub>lab</sub> = 24.3 and 29.8 MeV), measured at the post-accelerated beam facility, ISAC II, at TRIUMF (Vancouver, Canada). A remarkably large yield of <sup>9</sup>Li has been observed, a result that is attributed to the weak binding of the <sup>11</sup>Li nucleus. The angular distribution of this <sup>9</sup>Li yield, relative to the elastic one, has been analysed in terms of first-order semiclassical calculations as well as four-body and three-body Continuum-Discretized Coupled-Channels (CDCC) calculations, based on a three-body and di-neutron model of the <sup>11</sup>Li nucleus, respectively. The calculations reproduce well the trend of the data and support the existence of a large concentration of B(E1) strength at very low excitation energies. The connection of this large B(E1) with a possible low-lying dipole resonance is discussed....