Surface-restricted effective interactions in a shell model application to Sr88

We compare conventional phenomenological effective interactions acting throughout the nuclear volume with some surface restricted effective interactions for the particle-hole spectrum and properties of Sr88 in a basis of neutron and proton orbitals. The surface restricted forces produce greater configuration mixing and enhance the neutron particle-hole contributions to the lowest-lying states and thus result in better agreement with experiment. NUCLEAR STRUCTURE Sr88, Surface or density dependent effective interactions, particle-hole shell model structure, calculated levels, J, , B() spectroscopic factors.