EPJ Web Conf.
Volume 113, 201621st International Conference on Few-Body Problems in Physics
|Number of page(s)||4|
|Section||Nuclear Structure and Reactions|
|Published online||25 March 2016|
Two neutron decay of 16Be
1 Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
2 Lawrence Livermore National Laboratory, L-414, Livermore, California 94551, USA
Published online: 25 March 2016
Recently, the first example of two-neutron decay from the ground state of an unbound nucleus, 16Be, was seen (A. Spyrou, et. al., Phys. Rev. Lett. 108 102501 (2012)). Three-body methods are ideal for exactly treating the degrees of freedom important for these decays. Using a basis expansion over hyperspherical harmonics and the hyperspherical R-matrix method, we construct a realistic model of 16Be in order to investigate its decay mode and the role of the two-neutron interaction. The neutron-14Be interaction is constrained using shell model predictions. We obtain a ground state for 16Be that is under-bound by approximately 0.7 MeV with a width of approximately 0.17 MeV. For such a system, an attractive three-body force must be included to reproduce the experimental ground state energy.
© Owned by the authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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