Speaker
Haik Simon
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt)
Description
In my talk I'd like to present recent results obtained at GSI for the halo nucleus 14Be and it's unbound sub-system 13Be. The structure of these nuclei is a prerequisite to understand the observed structure and angular correlations for the heaviest known Lithium system 13Li [1]. 13Li and 13Be can be produced with relativistic beams by proton and neutron knock-out reactions, respectively, where the 14Be properties can be extracted from a comprehensive missing momentum and spectroscopic analysis. Recently, three data sets were published for 13Be, all with different interpretations of its ground-state structure. From the data obtained at GANIL [2] it is a Breit-Wigner l=0 resonance, it is a virtual s-state [3] populated in the one-neutron knockout from 14Be at GSI, and finally it is interpreted as a l=1 resonance from data obtained at RIKEN [4]. We have carried out a study of the root-mean-square (r.m.s) momentum of a fragment+n system after one neutron knockout from the Borrome an halo nucleus as a function of the relative energy between neutron and fragment. Results will be shown and discussed in view of the underlying nuclear structure.
[1] H.T. Johansson et al., Nucl. Phys. A847 (2010) 66.
[2] J.L. Lecouey, Few-Body Systems, 34 (2004) 21.
[3] H. Simon et al., Nucl. Phys. A 791 (2007) 267.
[4] Y. Kondo et al., Phys. Lett. B 690 (2010) 245.
Primary author
Haik Simon
(GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt)
