%0 Journal Article
%A Riisager, K.
%A Forstner, O.
%A Borges, M. J. G.
%A Briz Monago, José Antonio
%A Carmona Gallardo, Mariano
%A Fraile Prieto, Luis Mario
%A Fynbo, H.O.U.
%A Giles, T.
%A Gottberg, A.
%A Heinz, A.
%A Johansen, J.G.
%A Jonson, B.
%A Kurcewicz, J.
%A Lund, M.V.
%A Nilsson, T.
%A Nyman, G.
%A Rapisarda, E.
%A Steier, P.
%A Tengblad, O.
%A Thies, R.
%A Winkler, S.R.
%T Be11(βp), a quasi-free neutron decay?
%D 2014
%@ 03702693
%U https://hdl.handle.net/20.500.14352/34570
%X 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.
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