''Bare'' single-particle energies in Ni-56
Nov, 19967 pages
Published in:
- Phys.Rev.C 54 (1996) 2361-2368
Citations per year
Abstract: (APS)
The structure of the low-lying levels in the mirror nuclei Ni57 and Cu57 is described within the extended unified model. The problem of single-particle energies in Ni56 is treated in detail. ‘‘Bare’’ single-particle energies are extracted from existing experimental data for the energy levels in Ni57 and Cu57 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 Ni56 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 Ni56 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 Ni56. © 1996 The American Physical Society.- 21.60.Cs
- 21.10.Pc
- 21.10.Sf
- 27.40.+z
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