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

00925njm 22002777a 4500 dc Riisager, K. author Forstner, O. author Borges, M. J. G. author Briz Monago, José Antonio author Carmona Gallardo, Mariano author Fraile Prieto, Luis Mario author Fynbo, H.O.U. author Giles, T. author Gottberg, A. author Heinz, A. author Johansen, J.G. author Jonson, B. author Kurcewicz, J. author Lund, M.V. author Nilsson, T. author Nyman, G. author Rapisarda, E. author Steier, P. author Tengblad, O. author Thies, R. author Winkler, S.R. author 2014 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. 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 Be11(βp), a quasi-free neutron decay?