E. Lunderberg, P. A. DeYoung, Z. Kohley, H. Attanayake, T. Baumann, D. Bazin, G. Christian, D. Divaratne, S. M. Grimes, A. Haagsma, J. E. Finck, N. Frank, B. Luther, S. Mosby, T. Nagy, G. F. Peaslee, A. Schiller, J. Snyder, A. Spyrou, M. J. Strongman, M. Thoennessen
Evidence for the ground state of the neutron-unbound nucleus 26O was observed
for the first time in the single proton-knockout reaction from a 82 MeV/u 27F
beam. Neutrons were measured in coincidence with 24O fragments. 26O was
determined to be unbound by 150+50-150 keV from the observation of low-energy
neutrons. This result agrees with recent shell model calculations based on
microscopic two- and three-nucleon forces.
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http://arxiv.org/abs/1202.3973
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