''Bare'' single-particle energies in Ni-56
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Date
1996
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
The structure of the low-lying levels in the mirror nuclei Ni-57 and Cu-57 is described within the extended unified model. The problem of single-particle energies in Ni-56 is treated in detail. ''Bare'' single-particle energies are extracted from existing experimental data for the energy levels in Ni-57 and Cu-57 by carefully considering the influence of the coupling to excitations of the core. Important contributions arise, influencing especially the results on the spin-orbit splitting. The differences between the Coulomb energy shifts of various orbitals in Ni-56 are discussed and compared with those resulting from Hartree-Fock calculations carried out using a broad range of Skyrme interactions. The parameters of the Woods-Saxon potential reproducing these neutron ''bare'' single-particle energies and the charge root-mean-square radius of Ni-56 are extracted. It is demonstrated that the contributions associated with the Thomas-Ehrman effect and the electromagnetic spin-orbit interaction are important and large enough to account for the differences between the Coulomb energy shifts of the single-particle levels in Ni-56.
Description
Journals published by the American Physical Society can be found at http://publish.aps.org/
Keywords
SCATTERING, NUCLEI, Physics
Citation
L. Trache, A. Kolomiets, S. Shlomo, K. Heyde, H. Dejbakhsh, Carl A. Gagliardi, Robert E. Tribble, X. G. Zhou, V. E. Jacob and A. M. Oros. Phys.Rev.C 54 2361-2368 1996. "Copyright (1996) by the American Physical Society."