Near-barrier Fusion Induced by Stable Weakly Bound and Exotic Halo Light Nuclei

Beck, C.; Zafra, A. Sànchez i; Díaz-Torres, A.; Thompson, I. J.; Keeley, N.; Souza, F. A. de

doi:10.1063/1.2338406

Cited by 4 publications

References 18 publications

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Near-barrier Fusion and Breakup/Transfer induced by Weakly Bound and Exotic Halo Nuclei

Beck

2007

Nuclear Physics A

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8 pages, 3 figures; espcrc1 style; Invited Talk given at IX Int.Conf. on Nucleus-Nucleus Collisions, Rio de Janeiro Aug.2006; submitted to Nucl.Phys.AThe influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of the fusion cross section at sub-barrier energies was compared to predictions of one-dimensional barrier penetration models. This was understood in terms of the dynamical processes arising from strong couplings to collective inelastic excitations of the target and projectile. However, in the case of reactions where at least one of the colliding nuclei has a sufficiently low binding energy, for breakup to become an important process, conflicting model predictions and experimental r1esults have been reported in the literature. Excitation functions for sub- and near-barrier total (complete + incomplete) fusion cross sections have been measured for the $^{6,7}$Li+$^{59}$Co reactions. Elastic scattering as well as breakup/transfer yields have also been measured at several incident energies. Results of Continuum-Discretized Coupled-Channel (Cdcc) calculations describe reasonably well the experimental data for both reactions at and above the barrier. A systematic study of $^{4,6}$He induced fusion reactions with a three-body Cdcc method is presented. The relative importance of breakup and bound-state structure effects on total fusion (excitation functions) is particularly investigated. The four-body Cdcc model is being currently developed

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Near-barrier Fusion and Breakup/Transfer induced by Weakly Bound and Exotic Halo Nuclei

Beck

2007

Nuclear Physics A

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Reaction mechanisms in the 6Li+59Co system

et al. 2009

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The reactions induced by the weakly bound 6Li projectile interacting with the intermediate mass target 59Co were investigated. Light charged particles singles and $\alpha$-$d$ coincidence measurements were performed at the near barrier energies E_lab = 17.4, 21.5, 25.5 and 29.6 MeV. The main contributions of the different competing mechanisms are discussed. A statistical model analysis, Continuum-Discretized Coupled-Channels calculations and two-body kinematics were used as tools to provide information to disentangle the main components of these mechanisms. A significant contribution of the direct breakup was observed through the difference between the experimental sequential breakup cross section and the CDCC prediction for the non-capture breakup cross section.Comment: 30 pages, 8 figure

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