First Observation of 15Be
Physical Review C
The neutron-unbound nucleus 15Be was observed for the first time. It was populated using neutron transfer from a deuterated polyethylene target with a 59 MeV/u 14Be beam. Neutrons were measured in coincidence with outgoing 14Be particles and the reconstructed decay energy spectrum exhibits a resonance at 1.8(1) MeV. This corresponds to 15Be being unbound by 0.45 MeV more then 16Be thus significantly hindering the sequential two-neutron decay of 16Be to 14Be through this state.
Haring-Kaye, Robert A.; Snyder, Jesse; and Baumann, Thomas, "First Observation of 15Be" (2013). Physics & Astronomy Faculty Work. 9.
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