First observation of15Be

@inproceedings{Snyder2013FirstOO,
  title={First observation of15Be},
  author={J. Snyder and Tim Baumann and G Huber Christian and Robert A. Haring-Kaye and Paul A. Deyoung and Zach Kohley and B. Luther and Michelle Mosby and Arndt Simon and Janet Kiholm Smith and Artemis Spyrou and Stepheni L. Stephenson and M. Thoennessen},
  year={2013}
}
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. 

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