Riisager, K.Forstner, O.Borges, M. J. G.Briz Monago, José AntonioCarmona Gallardo, MarianoFraile Prieto, Luis MarioFynbo, 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.2023-06-192023-06-192014-04-040370269310.1016/j.physletb.2014.03.062https://hdl.handle.net/20.500.14352/34570We 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.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.1016/j.physletb.2014.03.062https://www.sciencedirect.com/science/article/pii/S0370269314002299open accessBeta decayHalo nucleus11BePartículas2208 Nucleónica