Be14via pion double charge exchange

The ${}_{}{}^{14}{}_{}{}^{}\mathrm{Be}$ nucleus has been produced in the reaction ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}({\pi }^{-},{\pi }^{+})$. The cross section for the reaction is roughly that which would be expected from the $A^{-\frac{4}{3}}$ mass dependence observed for nonanalog (${\pi }^{+}$,${\pi }^{-}$) reactions on self-conjugate nuclei. If it is the ground state that we observe, the mass excess of ${}_{}{}^7{}_{}{}^{}\mathrm{Be}$ is ∼600 keV smaller (more bound) than expected from systematics.