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oai:docta.ucm.es:20.500.14352/345702025-09-12T16:21:07Zcom_20.500.14352_14col_20.500.14352_15

Be11(βp), a quasi-free neutron decay? Riisager, K. Forstner, O. Borges, M. J. G. Briz Monago, José Antonio Carmona Gallardo, Mariano Fraile Prieto, Luis Mario Fynbo, H.O.U. Giles, T. Gottberg, A. Heinz, A. Johansen, J.G. Jonson, B. Kurcewicz, J. Lund, M.V. Nilsson, T. Nyman, G. Rapisarda, E. Steier, P. Tengblad, O. Thies, R. Winkler, S.R. We have observed β−-delayed proton emission from the neutron-rich nucleus 11Be by analyzing a sample collected at the ISOLDE facility at CERN with accelerator mass spectrometry (AMS). With a branching ratio of (8.3±0.9)· 10−6 the strength of this decay mode, as measured by the BGT -value, is unexpectedly high. The result is discussed within a simple single-particle model and could be interpreted as a quasi-free decay of the 11Be halo neutron into a single-proton state. 2023-06-19T13:53:13Z 2023-06-19T13:53:13Z 2014 journal article 0370-2693 10.1016/j.physletb.2014.03.062 https://hdl.handle.net/20.500.14352/34570 https://doi.org/10.1016/j.physletb.2014.03.062 https://www.sciencedirect.com/science/article/pii/S0370269314002299 eng https://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Elsevier