Neutron removal from the deformed halo nucleus ~(31)Ne

摘要

Experimental data on Coulomb breakup and neutron removal indicate that ~ (31)Ne is one of the heaviest halo nuclei discovered so far. The possible ground state of 31Ne is either 3/2~− coming from the p-wave halo or 1/2~+ coming from the s-wave halo. In this work, we develop a treatable model to include deformed wave functions and a dynamical knockout formalism that includes the dependence on the nuclear orientation to study the neutron removal from ~(31)Ne projectiles at energies around E ≈ 200 MeVucleon. A detailed account of the effects of deformation on cross sections and longitudinal momentum distributions is made.Our numerical analysis indicates a preference for the ~(31)Ne ground state with spin-parity 3/2−.