The two-proton shell gap in Sn isotopes |
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| Authors: | P. Fleischer P. Klüpfel T. Cornelius T. J. Bürvenich S. Schramm J. A. Maruhn P. -G. Reinhard |
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| Affiliation: | (1) Institut für Theoretische Physik, Universität Erlangen, Staudtstrasse 7, D-91058 Erlangen, Germany;(2) Institut für Theoretische Physik, Universität Frankfurt, D-60325 Frankfurt, Germany;(3) Theoretical Division, Los Alamos National Laboratory, 87545 Los Alamos, NM, USA |
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| Abstract: | We present an analysis of two-proton shell gaps in Sn isotopes. As theoretical tool we use self-consistent mean-field models, namely the relativistic mean-field model and the Skyrme-Hartree-Fock approach, both with two different pairing forces, a delta interaction (DI) model and a density-dependent delta interaction (DDDI). We investigate the influence of nuclear deformation as well as collective correlations and find that both effects contribute significantly. Moreover, we find a further significant dependence on the pairing force used. The inclusion of deformation plus correlation effects and the use of DDDI pairing provides agreement with the data. |
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| Keywords: | 21.10.Dr Binding energies and masses 21.10.Pc Single-particle levels and strength functions 21.60.Jz Hartree-Fock and random-phase approximations 24.10.Jv Relativistic models |
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