Radii of Optical-Model Potentials in Proton Scattering at 183 Mev

Proton scattering by Li, Be, C, Al, Fe, Ca, Ir, and Au is studied, using an optical model for the scattering nucleus. The optical model parameters involved in 183 Mev proton scattering by Al are adjusted to fit the observed differential scattering cross section vs. lab scattering angle relations. These adjusted parameters give qualitative agreement between calculated and observed scattering for the other nuclei under consideration. (T.F.H.)