Fusion and reactions of exotic nuclei

Abstract

Abstract. Close to the drip lines, the scattering cross sections of halo nuclei show a different behaviour as compared to the tightly bound projectiles of the stability line. Several experiments carried out in the last decade have been dedicated to investigate the competition between transfer, breakup and fusion channels at energies around and below the Coulomb barrier. The rather complex scenario gives rise to conflicting conclusions concerning the effect of breakup and transfer on reaction dynamics and the sub-barrier fusion process. In this work we discuss recent experimental findings in fusion and reactions of 6He halo nucleus at energies around the Coulomb barrier.

Low energy reactions of halo nuclei

“…The reaction probability can be estimated as Pr(rmax) = 1 -Pel(rmax), and this is shown with a dashed black line. It is surprising the good agreement obtained, despite the fact that the trajectory of the alphas should be modified due to the loss of the two-neutrons [23]. This suggests that the dominant dynamical process is actually a "soft" neutron transfer with reduced Q-value and momentum transfer in the vicinity of the distance of closest approach, producing a small disruption on the Coulomb trajectory.…”