The structure of superheavy elements newly discovered in the reaction of ${}^{86}$Kr with ${}^{208}$Pb

Abstract

The structure of superheavy elements newly discovered in the ${}^{208}$Pb(${}^{86}$Kr,n) reaction at Berkeley is systematically studied in the Relativistic Mean Field (RMF) approach. It is shown that various usually employed RMF forces, which give fair description of normal stable nuclei, give quite different predictions for superheavy elements. Among the effective forces we tested, TM1 is found to be the good candidate to describe superheavy elements. The binding energies of the ${}^{293}$118 nucleus and its $\alpha -$decay daughter nuclei obtained using TM1 agree with those of FRDM within 2 MeV. Similar conclusion that TM1 is the good interaction is also drawn from the calculated binding energies for Pb isotopes with the Relativistic Continuum Hartree Bogoliubov (RCHB) theory. Using the pairing gaps obtained from RCHB, RMF calculations with pairing and deformation are carried out for the structure of superheavy elements. The binding energy, shape, single particle levels, and the Q values of the $\alpha -$decay $Q_{\alpha }$ are discussed, and it is shown that both pairing correlation and deformation are essential to properly understand the structure of superheavy elements. A good agreement is obtained with experimental data on $Q_{\alpha }$. %Especially, the atomic number %dependence of $Q_{\alpha }$ %seems to match with the experimental observation

19 pages, 5 figures

References in corpus (3)

• Fusion cross sections for superheavy nuclei in the dinuclear system concept
• Potential energy surfaces of superheavy nuclei
• alpha-decay chains of Z=114, A=289 and Z=118, A=293 in the relativistic mean-field model

Cited by in corpus (9)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Magic numbers for superheavy nuclei in relativistic continuum Hartree-Bogoliubov theory
• The relativistic continuum Hartree-Bogoliubov description of charge-changing cross section for C,N,O and F isotopes
• Density distributions of superheavy nuclei
• Cross Section Limits for the ${}^{208}$Pb(${}^{86}$Kr,n)${}^{293}$118 Reaction
• Microscopic Description of Super Heavy Nuclei
• Alpha-decay chains of ${}_{173}^{288}115$ and ${}_{172}^{287}115$ in the Relativistic Mean Field theory
• Quantum tunneling in ^{277}112 and its alpha-decay chain
• The stability and the shape of the heaviest nuclei