β -p and β-α decay of the 11Be neutron halo ground state

Beta-delayed proton emission from the neutron halo ground state of Be-11 raised much attention due to the unusually high decay rate. It was argued that this may be due to the existence of a resonance just above the proton decay threshold. In this letter, we use the lenses of real-energy continuum shell model to describe several observables including the Gamow-Teller rates for the beta (-)-delayed alpha and proton decays, and argue that, within our model, the large beta (-)p branching ratio cannot be reconciled with other data.

Automated summary

Researchers used the real-energy continuum shell model to investigate beta-delayed proton emission from the neutron halo ground state of Be-11, suggesting the presence of a resonance, but found that the large beta-p branching ratio cannot be reconciled with other data.