Authors
Ayyad, Y.; Mittig, W.; Tang, T.; Olaizola, B.; Potel, G.; Rijal, N.; Watwood, N.; Alvarez-Pol, H.; Bazin, D.; Caamao, M.; Chen, J.; Kay, B.
Abstract
A narrow near-threshold proton-emitting resonance (Ex=11.4MeV, J=1/2+, and p=4.4keV) was directly observed in 11B via proton resonance scattering. This resonance was previously inferred in the -delayed proton emission of the neutron halo nucleus 11Be. The good agreement between both experimental results serves as a ground to confirm the existence of such exotic decay and the particular behavior of weakly bound nuclei coupled to the continuum. R-matrix analysis shows a sizable partial decay width for both, proton and (=11keV) emission channels.