Neutron Transition Densities For Low Lying States In Ni-58 Obtained By Using 200 Mev Inelastic Proton Scattering

Differential cross section and analyzing power measurements have been made for 200 MeV inelastic proton scattering from Ni-58. Using the code LEA, neutron transition densities have been obtained for four 2(+), one 3(-), and five 4(+) low lying states. Charge transition densities obtained from electron scattering were used in order to minimize the nuclear structure uncertainty, along with a recent 200 MeV empirical effective interaction. Two types of calculations have been used in comparison to the data, one in which the neutron transition densities are obtained by scaling the charge transition densities by N/Z, the other in which the neutron transition densities are allowed to vary to obtain a best fit to the data. Multipole matrix elements are obtained and compared to collective model analyses using both intermediate energy protons and pion scattering results. The radial shapes of the neutron transition densities for the lowest lying 2+ and 3- states are compared to those calculated using the energy density method. [S0556-2813(98)06810-1].