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11Li Breakup on 208 at energies around the Coulomb barrier
J P Fernández-García1, M Cubero2, M Rodríguez-Gallardo3
1Departamento de FAMN, Universidad de Sevilla, Apartado 1065, E-41080 Seville, Spain and Centro Nacional de Aceleradores, Universidad de Sevilla/Junta de Andalucía/CSIC, E-41092 Seville, Spain.
Abstract:
The inclusive breakup for the (11)Li + (208)Pb reaction at energies around the Coulomb barrier has been measured for the first time. A sizable yield of (9)Li following the (11)Li 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 (11)Li continuum at low excitation energy.
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