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Superheavy nuclei in relativistic effective Lagrangian model
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Isotopic and isotonic chains of superheavy nuclei are analyzed to search for spherical double shell closures beyond Z=82 and N=126 within the new effective field theory model of Furnstahl, Serot, and Tang for the relativistic nuclear many-body problem. We take into account several indicators to identify the occurrence of possible shell closures, such as two-nucleon separation energies, two-nucleon shell gaps, average pairing gaps, and the shell correction energy. The effective Lagrangian model predicts N=172 and Z=120 and N=258 and Z=120 as spherical doubly magic superheavy nuclei, whereas N=184 and Z=114 show some magic character depending on the parameter set. The magicity of a particular neutron (proton) number in the analyzed mass region is found to depend on the number of protons (neutrons) present in the nucleus.
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SIL, Tapas, et al. Superheavy nuclei in relativistic effective Lagrangian model. Physical Review C. 2004. Vol. 69, num. 4, pags. 044315-1-044315-11. ISSN 0556-2813. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/11006