The difference between the neutron and proton densities (${\rho }_n-{\rho }_p$) and the excess neutron density ${\rho }_{\mathrm{exc}}$ are computed for several nuclei using the Hartree-Fock approximation. Large differences are found between these two types of densities for nuclei with a small neutron excess. The above densities are related to transition densities in charge exchange reactions leading to isobaric analog states. It is argued that ${\rho }_{\mathrm{exc}}$ is the density which should be used in the computation of the cross section for such reactions in nuclei with a small number of excess neutrons.

[NUCLEAR STRUCTURE: Transition densities to isobaric analog states and charge exchange reactions.]

• Received 5 March 1981

DOI:https://doi.org/10.1103/PhysRevC.24.782