Analyzing power measurements for 209Bi(n,n) at 6 and 9 MeV and consistent dispersive optical-model analyses for n+209Bi and n+208Pb from -20 to +80 MeV

G. J. Weisel, W. Tornow, C. R. Howell, P. D. Felsher, M. AlOhali, M. L. Roberts, R. K. Das, R. L. Walter, G. Mertens

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High-accuracy measurements of Ay(θ) data for elastic scattering for n+209Bi have been performed at 6 and 9 MeV. The data are incorporated into a large database of σ(θ), Ay(θ), and σT for n+209Bi covering the energy range 1.0-80 MeV. A complementary database is constructed for n+208Pb 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 208Pb 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+208Pb and the n+209Bi systems are the Fermi energy and the isospin dependence in the real volume potential.

Original languageEnglish (US)
Pages (from-to)2410-2428
Number of pages19
JournalPhysical Review C - Nuclear Physics
Issue number5
StatePublished - Nov 1996

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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