Peninsula of neutron stability of nuclei in the neighborhood of neutron magic number N = 126 |
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Authors: | V N Tarasov K A Gridnev W Greiner S Schramm D K Gridnev D V Tarasov X Viñas |
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Institution: | 1. Kharkov Institute of Physics and Technology, Kharkov, 61108, Ukraine 2. St. Petersburg State University, St. Petersburg, 199034, Russia 3. Frankfurt Institute for Advanced Studies, 60438, Frankfurt-am-Main, Germany 4. University of Barcelona, 08007, Barcelona, Spain
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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. |
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