Observation of a Low-Lying Neutron Unbound State in 25F

A low energy neutron unbound state of $^{25}$F has been observed. The $^{25}$F isotopes were produced by one-proton removal from an 86 MeV/u $^{26}$Ne beam on a Beryllium target at the fast-fragmentation radioactive beam facility of the National Superconducting Cyclotron Laboratory at Michigan State University. The subsequent decay of the $^{25}$F isotopes resulted in $^{24}$F and neutrons that were detected in coincidence. The properties of the charged particles and neutrons were used to reconstruct a decay energy spectrum for $^{25}$F, which was compared to simulations. The simulations include a stripping reaction model, decay energy line-shapes, and, detector resolutions and acceptances. Results and simulation details will be discussed.