Journal
PHYSICS LETTERS B
Volume 732, Issue -, Pages 305-308Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2014.03.062
Keywords
Beta decay; Halo nucleus; Be-11
Funding
- European Union Seventh Framework through ENSAR [262010]
- Austrian Science Fund (FWF) [P22164-N20]
- Spanish MINECO [FPA2010-17142, FPA2012-32443]
- CPAN Consolider [CSD-2007-00042]
- Austrian Science Fund (FWF) [P22164] Funding Source: Austrian Science Fund (FWF)
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We have observed beta(-)-delayed proton emission from the neutron-rich nucleus Be-11 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 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 Be-11 halo neutron into a single-proton state. (C) 2014 The Authors. Published by Elsevier B.V.
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