Abstract
We have studied the effects of tensor coupling of and meson terms, the Coulomb exchange term in local density approximation, and various isoscalar-isovector coupling terms of relativistic mean-field model on the properties of nuclear matter, finite nuclei, and superheavy nuclei. We found that for the same fixed value of symmetry energy or its slope the presence of tensor coupling of and meson terms and the Coulomb exchange term yields thicker neutron skin thickness of . We also found that the roles of tensor coupling of and meson terms, the Coulomb-exchange term in local density approximation, and various isoscalar-isovector coupling terms on the bulk properties of finite nuclei vary depending on the corresponding nucleus mass. However, on average, tensor coupling terms play a significant role in predicting the bulk properties of finite nuclei in a quite wide mass range, especially in binding energies. We also observed that for some particular nuclei, the corresponding experimental data of binding energies are rather less compatible with the presence of the Coulomb-exchange term in local density approximation and they tend to disfavor the presence of isoscalar-isovector coupling term with too-high value. Furthermore, we have found that these terms influence the detail properties of superheavy nucleus such as binding energies, the magnitude of two-nucleon gaps, single-particle spectra, neutron densities, neutron skin thicknesses, and mean-square charge radii. However, the shell-closure predictions of and nuclei are not affected by the presence of these terms.
7 More- Received 15 November 2015
- Revised 10 April 2016
DOI:https://doi.org/10.1103/PhysRevC.93.054322
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