The Bansal-French-Zamick model is quite successful in accounting for the Coulomb displacement energies of excited particle-hole states in a variety of light nuclei. Level shifts are typically reproduced to within 50 keV. However, the model fails for certain excited $0^{+}$ states, and this remains a puzzle.

NUCLEAR STRUCTURE Calculated Coulomb energies of particle-hole states $A=13\mathrm{} \mathrm{to} 45$.

• Received 11 June 1975

DOI:https://doi.org/10.1103/PhysRevC.12.1671