Eikonal model analysis for 9Li + p and 11Li + p elastic scatterings and halo effect

초록

The elastic angular distributions for 9Li + p and 11Li + p at E<inf>lab</inf>/A=60 and 62 MeV/ nucleon, respectively, have been analyzed within the framework of the eikonal model. It is assumed that 11Li has the halo structure of a 9Li core plus two weakly bound neutrons and is treated such that the nuclear potential has a sum of the core and halo neutron contributions. We have found that the break-up effect of halo neutrons is essential to understand the elastic cross sections of 11Li + p system at E<inf>lab</inf>/A = 62 MeV/nucleon. The near- and the far-side decompositions of elastic cross sections have also been performed by following the Fuller's formalism.