Asymmetry dependence of nucleon correlations in spherical nuclei extracted from a dispersive-optical-model analysis

Journal Article (Journal Article)

Neutron elastic-scattering angular distributions were measured at beam energies of 11.9 and 16.9 MeV on Ca40,48 targets. These data plus other elastic-scattering measurements, total and reaction cross-sections measurements, (e,e′p) data, and single-particle energies for magic and doubly magic nuclei have been analyzed in the dispersive optical-model (DOM), generating nucleon self-energies (optical-model potentials) that can be related, via the many-body Dyson equation, to spectroscopic factors and occupation probabilities. It is found that, for stable nuclei with N≥Z, the imaginary surface potential for protons exhibits a strong dependence on the neutron-proton asymmetry. This result leads to a more modest dependence of the spectroscopic factors on asymmetry. The measured data and the DOM analysis of all considered nuclei clearly demonstrate that the neutron imaginary surface potential displays very little dependence on the neutron-proton asymmetry for nuclei near stability (N≥Z). © 2011 American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Mueller, JM; Charity, RJ; Shane, R; Sobotka, LG; Waldecker, SJ; Dickhoff, WH; Crowell, AS; Esterline, JH; Fallin, B; Howell, CR; Westerfeldt, C; Youngs, M; Crowe, BJ; Pedroni, RS

Published Date

  • June 15, 2011

Published In

Volume / Issue

  • 83 / 6

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.83.064605

Citation Source

  • Scopus