Spectroscopy of neutron-unbound $^{15}$Be

A (d,p) reaction was used to populate neutron unbound states in $^{15}$Be from a secondary beam of $^{14}$Be at 55 MeV/u impinging upon a deuterated polyethylene target. The unbound states in $^{15}$Be decayed though the emission of a neutron. The neutron was detected using MoNA, an array of 144 plastic scintillator bars. The charged $^{14}$Be fragments were deflected by the Sweeper dipole magnet into a system of charged particle detectors which allow the reconstruction of their kinematic properties. The decay energy was calculated through invariant mass analysis, using the energy and momentum information of the neutron and fragment at the target. Results will be presented.