We present calculations for the energies and widths of the lowest $1∕2^{+}$, $1∕2^{-}$, and $5∕2^{+}$ levels of ${}^9\mathrm{B}$, taking into account the information known for the mirror levels in ${}^9\mathrm{Be}$. Comparison is made with the experimental data.

• Received 2 April 2003

DOI:https://doi.org/10.1103/PhysRevC.70.054312