The decay of unbound excited 11Li was measured after being populated by a two-proton removal from a 13B beam at 71 MeV/nucleon. Decay energy spectra and Jacobi plots were obtained from measurements of the momentum vectors of the 9Li fragment and neutrons. A resonance at an excitation energy of ∼1.2 MeV was observed. The kinematics of the decay are equally well fit by a simple dineutron-like model or a phase-space model that includes final state interactions. A sequential decay model can be excluded.
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Smith, J.K, T. Baumann, D. Bazin, J. Brown, P.A. DeYoung, N. Frank, M.D. Jones, Z. Kohley, B. Luther, B. Marks, A. Spyrou, S.L. Stephenson, M. Thoennessen, and A. Volya. "Neutron correlations in the decay of the first excited state of 11Li." Nuclear Physics A 955 (2016). pp. 27-40.
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