Single-particle Properties of Asymmetric Nuclear Matter Based on Two- and Three-Body Forces within Brueckner Theory

摘要

We study the single-particle (sp) properties of asymmetric nuclear within the framework of the Brueckner-Hartree-Fock (BHF) approach extended by including a phenomenological three-body force (3BF). These properties are the single-particle energy, the nucleon effective masses and the nuclear symmetry potential. Two kinds of realistic nucleon-nucleon interactions have been extensively used in the present BHF calculations. One is the charge-dependent Bonn potential (CD-Bonn) and the other is local soft core Argonne (V18). It is demonstrated that the single-particle potential becomes more attractive for the proton and more repulsive for the neutron at higher asymmetries. Also, the symmetry potentials at the normal density for different asymmetry parameters are in good agreement with the empirical value constrained by the experimental data. Finally, the neutron and proton effective masses show strong isospin splitting with m*n m*p on the whole range of asymmetry parameters. So the 1BF force has effects turn out to be crucial for predicting reliably the sp properties within the Brueckner framework.