On the Dependence of the Nuclear Surface Diffuseness on the Neutron–Proton Asymmetry and Its Influence on the Evolution of the Single-Particle Spectra

Abstract

Abstract: The single-particle energies of the Si, Ca, Ti, Cr, Fe, Ni, and Sn isotopes were analyzed in terms of the dispersive optical model. The influence of the diffuseness aHF of the Hartree–Fock component of the potential on the description of experimental data on the evolution of the neutron single-particle energies of the Si isotopes, neutron energy gaps 1f5/2–2p3/2 in the isotopes from Ca to Ni, and proton energy gaps 2s1/2–1d3/2 in the Ca isotopes and 1g7/2–2d5/2 in the Sn isotopes was studied. The results provide evidence that the diffuseness aHF depends on the neutron–proton asymmetry.