Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-04-14
Nucl.Phys. A740 (2004) 59-76
Physics
Nuclear Physics
Nuclear Theory
25 pages, 6 figures and 2 tables
Scientific paper
10.1016/j.nuclphysa.2004.04.117
A shape change of the self-consistent mean-field induced by a configuration change is discussed within the conventional constrained Hartree-Fock (CHF) theory. It is stressed that a single-particle level crossing dynamics should be treated carefully, because the shape of the mean-field in such a finite many-body system as the nucleus strongly changes depending on its configuration. This situation is clearly shown by applying an adiabatic assumption, where the most energetically favorable single-particle states are assumed to be occupied. The excited HF states and the continuously-connected potential energy curves are given by applying the configuration dictated CHF method. The effect of pairing correlation is discussed in the level crossing region. Triaxial deformed results in our Hartree-Fock-Bogoliubov (HFB) calculation with Gogny force nicely reproduce the available experimental data of Ge isotopes. From our numerical calculation, it is concluded that the CHFB state is more fragile than the CHF state in the level crossing region.
Guo Lu
Sakata Fumihiko
Zhao En-Guang
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