Tangential velocity and halo effects in the <SUP>9</SUP>Li + p and <SUP>11</SUP>Li + p elastic scatterings

초록

We present the Coulomb-modified eikonal model formalism based on a hyperbolic trajectory by using a tangential velocity at the distance of closest approach. By assuming that Li-11 has a halo structure of two weakly bound neutrons around the Li-9 core, we take the total nuclear optical potential as a sum of the core and the two halo neutrons. The theoretical calculations for the elastic scattering of Li-9 + p and Li-11 + p at E-lab/A = 60 and 62 MeV, respectively are in good agreements with the observed data. It is found that the break-up effect of halo neutrons and the tangential velocity at the distance of closest approach are both important to understand the elastic cross sections of Li-11 + p system at E-lab/A = 62 MeV.

키워드