Scattering of 0. 8 GeV protons from lead-208, carbon-12, and carbon-13. [Angular distributions, J,. pi. ]

The first angular distributions for elastic scattering of 0.8 GeV protons from /sup 12/C, /sup 13/C, and /sup 208/Pb, obtained using the High Resolution Spectrometer (HRS) at the Clinton P. Anderson Meson Physics Facility (LAMPF) at the Los Alamos Scientific Laboratory, are presented. A brief description is given of an analysis of the elastic scattering data in terms of the Kerman-McManus-Thaler formalism with spin dependent nucleon-nucleon amplitudes. The data are shown to be sensitive to details of proton and neutron matter distributions. The proton distributions as determined by electromagnetic probes are used along with the available spin independent nucleon-nucleon scattering amplitudes. Preliminary analyzing power measurements are used to fix the spin-dependent amplitudes. The neutron distributions are adjusted to fit the data. Inelastic scattering of protons, exciting the first two states of /sup 208/Pb and many states in /sup 13/C and /sup 12/C, is analyzed in terms of the distorted wave Born approximation (DWBA). The model of coupling a /sup 1///sub 2//sup -/ neutron to the excited states of /sup 12/C is found to explain some of the /sup 13/C excited states. Using this model a new assignment of J/sup ..pi../ = /sup 7///sub 2//sup +/ has been made to the 11.9 MeV state of /sup 13/C. A coupled channels calculation using a 0/sup +/, 2/sup +/, 4/sup +/ rotational band is found to explain the 4/sup +/, 14.1-MeV state in /sup 12/C.