Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2001-11-16
Phys.Rev. C65 (2002) 024606
Physics
Nuclear Physics
Nuclear Theory
15 pages, 7 figures, accepted in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.65.024606
The effect of continuum couplings in the fusion of the halo nucleus $^{11}$Be on $^{208}$Pb around the Coulomb barrier is studied using a three-body model within a coupled discretised continuum channels (CDCC) formalism. We investigate in particular the role of continuum-continuum couplings. These are found to hinder total, complete and incomplete fusion processes. Couplings to the projectile $1p_{1/2}$ bound excited state redistribute the complete and incomplete fusion cross sections, but the total fusion cross section remains nearly constant. Results show that continuum-continuum couplings enhance the irreversibility of breakup and reduce the flux that penetrates the Coulomb barrier. Converged total fusion cross sections agree with the experimental ones for energies around the Coulomb barrier, but underestimate those for energies well above the Coulomb barrier.
Diaz-Torres Alexis
Thompson Ian J.
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