Bulg. J. Phys. vol.44 no.4 (2017), pp. 334-344

Density and Isospin Dependence of Spin-Orbit Splittings in N = 20 Nuclei within Relativistic Mean-Field Models

G.A. Lalazissis1, K. Karakatsanis1, P. Ring2, E. Litvinova3,4
1Aristotle University of Thessaloniki, Dept. Physics, GR-54124 Thessaloniki, Greece
2Technical University of Munich, Dept. Physics, D-85747 Garching, Germany
3Western Michigan University, Dept. Physics, Kalamazoo, MI 49008 USA
4MSU, NSCL, East Lancing MI 48824 USA
Abstract. An essential ingredient for our understanding of the shell structure in nuclei is the spin-orbit coupling. The fact that, in relativistic mean field (RMF) models of nuclear structure, the large spin-orbit (SO) potential emerges naturally from the form of the the Dirac equation, is one of their most important advantages. Following recent experimental studies, we investigate the size of 2p- and 1f-splittings for the isotone chain 40Ca, 38Ar, 36S, and 34Si in the framework of various relativistic density functionals. We compare our results with those of non-relativistic models and with the corresponding experimental data.

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