Evidence of a near-threshold resonance in ${}^{11}$B relevant to the $\beta$-delayed proton emission of ${}^{11}$Be

Y. Ayyad, W. Mittig, T. Tang +27

A narrow near-threshold proton-emitting resonance (Ex = 11.4 MeV, J${}^{\pi }$ = 1/2${}^{+}$ and ${\Gamma }_p$ = 4.4 keV) was directly observed in ${}^{11}$B via proton resonance scattering. This r…