1 Department of Physics and Astronomy, Science and Technology, Aarhus University2 Universidad de Sevilla, Apartado 10653 Instituto de Estructura de la Materia-CSIC4 Istituto Nazionali di Fisica Nucleare-Laboratori Nazionali del Sud (INFN-LNS)5 TRIUMF6 University of York7 Saint Mary’s University8 Centro de Física Nuclear da Universidade de Lisboa (CFNUL)9 Universidad de Sevilla10 Universidad de Huelva11 Chalmers University of Technology12 University of Edinburgh13 Department of Physics and Astronomy, Science and Technology, Aarhus University
The inclusive breakup for the 11Li+208Pb reaction at energies around the Coulomb barrier has been measured for the first time. A sizable yield of 9Li following the 11Li dissociation has been observed, even at energies well below the Coulomb barrier. Using the first-order semiclassical perturbation theory of Coulomb excitation it is shown that the breakup probability data measured at small angles can be used to extract effective breakup energy as well as the slope of B(E1) distribution close to the threshold. Four-body continuum-discretized coupled-channels calculations, including both nuclear and Coulomb couplings between the target and projectile to all orders, reproduce the measured inclusive breakup cross sections and support the presence of a dipole resonance in the 11Li continuum at low excitation energy.