Abstract
High-accuracy measurements of A(y)(theta) data for elastic scattering for n + Bi-209 have been performed at 6 and 9 MeV. The data are incorporated into a large database of sigma(theta), A(y)(theta), and sigma(T) for n + Bi-209 covering the energy range 1.0-8.0 MeV. A complementary database is constructed for n + Pb-208 and a dispersive optical-model analysis is performed for both scattering systems while constraining many of the parameters to be identical for both systems. A good representation of both databases is obtained with conventional geometry and spin-orbit parameters. The Pb-208 model predicts quite well the measured energies of valence single-particle and single-hole bound states. Occupation probabilities and spectroscopic factors for the same bound states are also calculated. Finally, a fully constrained model is presented in which the only differences between the n + Pb-208 and the n +Bi-209 systems are the Fermi energy and the isospin dependence in the real volume potential.