Description Of Carbon Isotopes Within Relativistic Hartree-Fock-Bogliuboy Theoty

In the past thirty years? relativistic mean field provide a reliable theory plat to study and probe the structure properties of the nuclear system, and succeed in describing the nuclear structure, nuclear reaction and nuclear astrophysics. With the development of the RMF theories, the description of nuclear structure in relativistic Hartree-Fock (RHF) also get some progress. Due to the complex of RHF theory itself, it exists a big limit in quantitatively description and application. In recent years, the density-dependent relativistic Hartree-Fock (DDRHF) theory can solve the problem. It can not only provide a equal quantitative description to RMF theory, but also improve isospin pertinence the description of evolution of the nuclear structure, relativistic symmetry and the nuclear low excitation, as well as exotic nuclei and nuclear astrophysics, due to introducing the Fock terms and considering the exchange of the one Ï€ meson and the tensor coupling of p mesons self-consistently.Within the relativistic Hartree-Fock-Bogoliubov (RHFB) theory, the structure properties of Carbon isotopes are systematically studied, especially for the halo structure. In order to reproduce the experiment data of binding energies, single-and two-neutron separate energies, we take the finite-range Gogny D1S with a strength factor f to modify the pairing force.The binding energies, the neutron-density distribution, single-particle level, neutron radii of carbon isotopes and so on are calculated With density-dependent RHF effect interaction PKA1, PKO2and PKO3, density-dependent relativistic Hartree effect interaction PKDD and DDME2, as well as non-linear self-coupling relativistic mean field effect interaction PK1and NL2. It is indicate that the two-neutron halo in C is not well supported due to a large two-neutron separation energy1.56MeV, and the single-neutron halo structures in both C and C exist due to lack of extra binding which comes from pairing correlation. It is also found that close to the neutron drip line there exists distinct odd-even staggering (OES) on neutron radii, which is tightly related with the blocking effects and the OES mainly contributes to2sI state. Correspondingly the blocking effect plays a significant role in halo formation. On the other hand, the shell structure of N=16result in the inversion for the2s1/2å'Œ1d5/2.