{open_quote}{open_quote}Bare{close_quote}{close_quote} single-particle energies in {sup 56}Ni

Journal Article · Fri Nov 01 04:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.2361· OSTI ID:389421

Trache, L; Kolomiets, A; Shlomo, S; Heyde, K; Dejbakhsh, H; Gagliardi, C A; Tribble, R E; Zhou, X G; Iacob, V E; Oros, A M ^[1]

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1. Cyclotron Institute, Texas A&M University, College Station, Texas 77843 (United States)

The structure of the low-lying levels in the mirror nuclei {sup 57}Ni and {sup 57}Cu is described within the extended unified model. The problem of single-particle energies in {sup 56}Ni is treated in detail. {open_quote}{open_quote}Bare{close_quote}{close_quote} single-particle energies are extracted from existing experimental data for the energy levels in {sup 57}Ni and {sup 57}Cu 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 {sup 56}Ni 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 {open_quote}{open_quote}bare{close_quote}{close_quote} single-particle energies and the charge root-mean-square radius of {sup 56}Ni 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 {sup 56}Ni. {copyright} {ital 1996 The American Physical Society.}

• DOE Contract Number: FG03-93ER40773
• OSTI ID: 389421
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COPPER 57
COULOMB ENERGY
COUPLING
ENERGY
ENERGY LEVELS
EXCITATION
HARTREE-FOCK METHOD
MIRROR NUCLEI
NICKEL 56
NICKEL 57
NICKEL 58
SINGLE-PARTICLE MODES
SKYRME POTENTIAL
WOODS-SAXON POTENTIAL