3D solution of Hartree-Fock-Bogoliubov equations for drip-line nuclei

J. Terasaki (1) , P.H. Heenen (1) , H. Flocard (2) , P. Bonche (3)

1 SPT-ULB - Service de Physique Théorique [Bruxelles]
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 SPhT - Service de Physique Théorique

We investigate the possibility of describing triaxial quadrupole deformations for nuclei close to the two-neutron drip line by the Hartree-Fock-Bogoliubov method taking into account resonances in the continuum. We use a Skyrme interaction to describe the Hartree-Fock hamiltonian and a density-dependent zero-range interaction to evaluate the pairing field. The mean-field equations are solved in a three-dimensional cubic mesh. We study the stability of the two-neutron separation energies and of the description of the nuclear surface as a function of the number of active mean-field orbitals and of the size of the mesh. The even Ni isotopes are used as a test case and the accuracy as a function of quadrupole deformation is studied by performing constrained calculations. A first application to the study of the two-neutron separation energies in Ni isotopes up to the drip line is presented.

Mots clés: Nuclei far from stability; Hartree-Fock-Bogoliubov method for deformed nuclei; S$_{2n}$ for Ni isotopes

Domaines: Physique Nucléaire Théorique [nucl-th]

J. Terasaki, P.H. Heenen, H. Flocard, P. Bonche. 3D solution of Hartree-Fock-Bogoliubov equations for drip-line nuclei. Nuclear Physics A, 1996, 600 (3), pp.371-386. ⟨10.1016/0375-9474(96)00036-X⟩. ⟨in2p3-00002193⟩