Evidence for the ${}^{15}\text{Be}$ ground state from ${}^{12}$Be$+3$n events

A. N. Kuchera, R. Shahid, J. Zhao +8

Background: ${}^{15}$Be is an unbound nuclide that has been observed to decay by one-neutron emission. Shell model calculations predict two low-lying states in its energy spectrum, h…