Beryllium beyond the neutron drip-line: 13Be

Abstract

In the framework of R3B Collaboration (Reactions with Relativistic Radioactive Beams) the s393 experiment was scheduled at GSI (Darmstadt, Germany) in the late summer 2010. The goals of the experiment were to study the r-process and the quasi-free scattering, including shell structure, quenching, cluster structures & nuclei beyond the neutron drip-line, utilizing kinematically complete measurements. In this last subject we are focusing in the beryllium isotope 13Be. The unbound 13Be system provide information about nuclear formation & shell structure close and beyond the neutron drip-line. This nucleus has been studied before using the two-neutron halo nucleus 14Be in break-up reactions at GSI1 as well as at RIKEN2. The R3B Collaboration has discussed all the available information3, including an experiment in GANIL4 with incoming 14B which has been recently published. The system 13Be is interesting for the understanding of the break-up and formation of extreme nucleus systems. In our study, we are approaching 13Be from 14B with the possibility of gamma ray measurements in order to extract additional nuclear structure information complementary to the former experiments.