Energies of the two lowest $(sd{)}^2{0}^{+}$ states in ${}^{10,12}\mathrm{Be}$ and ${}^{14,16}\mathrm{C}$ are examined in a simple model that works surprisingly well. Energies are predicted for the second $(sd{)}^2{0}^{+}$ state in ${}^{10,12}\mathrm{Be}$, where they are unknown.

• Received 7 May 2014
• Revised 10 June 2014

DOI:https://doi.org/10.1103/PhysRevC.89.067302