2013•Bulletin of the Russian Academy of Sciences PhysicsRequires access
Peninsula of neutron stability of nuclei in the neighborhood of neutron magic number N = 126
V. N. Tarasov, К. А. Гриднев, Walter Greiner, S. Schramm, D. K. Gridnev, D. V. Tarasov, X. Viñas
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Abstract
The properties of the ground state of even-even nuclei with extreme neutron excess that are remote from the known neutron drip line (NDL) are calculated. The calculations are based on the Hartree-Fock method with Skyrme forces SkM*, SkI2, Sly4, Ska) with allowance for axial deformation and the BCS pairing approximation. It is shown that the isotone chain at the neutron number N = 126 beyond the NDL forms a peninsula of nuclei that are stable with respect to the emission of one neutron (PNS). The neutron and proton density distributions of the PNS nuclei have spherical symmetry. A mechanism for restoring the stability of nuclei beyond the NDL is discussed. The obtained results are compared with those from Hartree-Fock-Bogoliubov calculations for long isotope chains of Zr and Pd up to the NDL.