We use known widths and branching ratios in ${}^{11}\mathrm{Be}$ to discuss $J^{\mathrm{\pi }}$ and configuration admixtures. Analysis favors 3/$2^{-}$ for the 3.96-MeV state and three-state mixing for this $J^{\mathrm{\pi }}$.

• Received 3 March 2011

DOI:https://doi.org/10.1103/PhysRevC.83.054314