We study the Coulomb energy shifts in mirror nuclei with the emphasis on the halo nuclei, ${}^{11}\mathrm{Be}$ and ${}^{11}\mathrm{N}.$ We find that even in such loosely bound nuclei the second- and higher-order Coulomb contributions are relatively small and the large relative Coulomb energy shifts are due to first order effects in the Coulomb interaction.

• Received 22 February 2000

DOI:https://doi.org/10.1103/PhysRevC.63.017301