Two neutron decay of 16Be
Abstract
Recently, the first example of two-neutron decay from the ground state of an unbound nucleus, Be, was seen. 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 Be in order to investigate its decay mode and the role of the two-neutron interaction. The neutron-Be interaction is constrained using shell model predictions. We obtain a ground state for Be that is over-bound by approximately 1 MeV with a width of approximately 0.23 MeV. This suggests, that for such systems, the three-body force needs to be repulsive.
Cite
@article{arxiv.1509.01193,
title = {Two neutron decay of 16Be},
author = {A. E. Lovell and F. M. Nunes and I. J. Thompson},
journal= {arXiv preprint arXiv:1509.01193},
year = {2016}
}
Comments
4 pages, 1 figure, contribution to the proceedings for the 21st International Conference on Few Body Problems in Physics, Chicago, Illinois, USA