Ground state properties of odd-Zsuperheavy nuclei

Abstract

The ground state properties of odd-Z superheavy nuclei in the mass range of are systematically investigated in deformed relativistic mean-field ͑RMF͒ theory. Special emphasis is placed on nuclear shell effect around Nϭ184. Calculations clearly show that the RMF model can reliably reproduce the data of binding energy and ␣ decay energy of known nuclei and can also be used to predict the binding energy of unknown nuclei. It is found that deformation plays an important role for many superheavy nuclei. For Nϭ184 isotones, the lighter ones are approximately spherical but the heavier ones are deformed. The ␣-decay energies of Nϭ184 isotones are lower than those of neighboring nuclei in some cases and higher in other cases. This demonstrates that there is a complicated structural behavior for Nϭ184 isotones.

New model of binding energies of heavy nuclei withZ≥90

“…As the number of parameters sets of Skyrme-Hartree-Fock model is more than 40, the predictions are strongly dependent on the inputs of the parameters. For the relativistic mean-field models, many force parameters favor the existence of shape coexistence of superheavy nuclei [10,11,39]. This can be the new mechanism of the existence of superheavy nuclei [10,11,[39][40][41].…”

Global calculation of α-decay half-lives with a deformed density-dependent cluster model

“…There has been growing interest in the α-decay half-lives of superheavy nuclei in recent years [22,28,30,35,52,53]. These studies are useful for future experiments on superheavy nuclei.…”

“…The quadrupole deformation in column 3 is taken from the calculations of the macroscopic-microscopic model (MM) [31]. The quadrupole deformation in column 4 is taken from the calculations of the relativistic mean-field model (RMF) with a TMA force parameter [52,53]. The experimental α-decay half-lives T α (Exp.)…”

Effects of the density dependence of the nuclear symmetry energy on the properties of superheavy nuclei

“…In the presence of the central depression, the sensitivity of the properties of SHN to various density dependencies of the symmetry energy can be affected. Though the properties of SHN have been explored in a great number of works [15][16][17][18][19][20][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45], investigations on the symmetry-energy-dependent effect are scarce. Thus, it is the aim of this work to investigate the effect of the softening of the symmetry energy on the ground-state properties of SHN, especially the shell closure.…”