Coupled-channels effects in elastic scattering and near-barrier fusion induced by weakly bound nuclei and exotic halo nuclei

摘要

The influence on fusion of coupling to the breakup process is investigatedfor reactions where at least one of the colliding nuclei has a sufficiently lowbinding energy for breakup to become an important process. Elastic scattering,excitation functions for sub-and near-barrier fusion cross sections, andbreakup yields are analyzed for $^{6,7}$Li+$^{59}$Co. Continuum-DiscretizedCoupled-Channels (CDCC) calculations describe well the data at and above thebarrier. Elastic scattering with $^{6}$Li (as compared to $^{7}$Li) indicatesthe significant role of breakup for weakly bound projectiles. A study of$^{4,6}$He induced fusion reactions with a three-body CDCC method for the$^6$He halo nucleus is presented. The relative importance of breakup andbound-state structure effects on total fusion is discussed.