https://doi.org/10.1140/epja/i2004-10054-4
The two-proton shell gap in Sn isotopes
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
Received:
11
May
2004
Accepted:
14
July
2004
Published online:
16
November
2004
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.
PACS: 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 –
© Società Italiana di Fisica and Springer-Verlag, 2004
