11Be(beta-p), a quasi-free neutron decay?

We have observed beta-delayed proton emission from the neutron-rich nucleus 11Be by analysing a sample collected at the ISOLDE facility at CERN with accelerator mass spectrometry (AMS). With a branching ratio of (8.4 +- 0.6) 10^{-6} the strength of this decay mode, as measured by the B(GT)-value, is...

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Bibliographic Details
Published in:arXiv.org 2014-02
Main Authors: Riisager, K, stner, O, Borge, M J G, Briz, J A, Carmona-Gallardo, M, Fraile, L M, 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
Format: Article
Language:English
Subjects:
Beta decay
Emission analysis
Mass spectrometry
Neutron decay
Nuclei (nuclear physics)
Particle decay
Online Access:Get full text
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Summary:We have observed beta-delayed proton emission from the neutron-rich nucleus 11Be by analysing a sample collected at the ISOLDE facility at CERN with accelerator mass spectrometry (AMS). With a branching ratio of (8.4 +- 0.6) 10^{-6} the strength of this decay mode, as measured by the B(GT)-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.
ISSN:2331-8422
DOI:10.48550/arxiv.1402.1645