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Full-Text Articles in Physical Sciences and Mathematics
Low-Lying Neutron Unbound States In 12be, J. K. Smith, T. Baumann, D. Bazin, J. Brown, S. Casarotto, P. A. Deyoung, N. Frank, J. Hinnefeld, M. Hoffman, M. D. Jones, Z. Kohley, B. Luther, B. Marks, N. Smith, J. Snyder, A. Spyrou, Sharon L. Stephenson, M. Thoennessen, N. Viscariello, S. J. Williams
Low-Lying Neutron Unbound States In 12be, J. K. Smith, T. Baumann, D. Bazin, J. Brown, S. Casarotto, P. A. Deyoung, N. Frank, J. Hinnefeld, M. Hoffman, M. D. Jones, Z. Kohley, B. Luther, B. Marks, N. Smith, J. Snyder, A. Spyrou, Sharon L. Stephenson, M. Thoennessen, N. Viscariello, S. J. Williams
Physics and Astronomy Faculty Publications
The neutron decay of an unbound resonance in 12Be has been measured at 1243 ± 21 keV decay energy with a width of 634 ± 60 keV. This state was populated with a one-proton removal reaction from a 71 MeV/u 13B beam incident upon a beryllium target. The invariant mass reconstruction of the resonance was achieved by measuring the daughter fragment in coincidence with neutrons. Despite being above the 2n separation energy, the state decays predominantly by the emission of one neutron to 11Be, setting an upper limit on the branching ratio for the two-neutron decay channel to 10Be of …