Alpha-decay chains of ${}_{173}^{288}115$ and ${}_{172}^{287}115$ in the Relativistic Mean Field theory

Abstract

In the recent experiments designed to synthesize the element 115 in the ${}^{243}$Am+${}^{48}$Ca reaction at Dubna in Russia, three similar decay chains consisting of five consecutive $\alpha$-decays, and another different decay chain of four consecutive $\alpha$-decays are detected, and the decay properties of these synthesized nuclei are claimed to be consistent with consecutive $\alpha$-decays originating from the parent isotopes of the new element 115, ${}^{288}115$ and ${}^{287}115$, respectively\cite{ogan.03}. Here in the present work, the recently developed deformed RMF+BCS method with a density-independent delta-function interaction in the pairing channel is applied to the analysis of these newly synthesized superheavy nuclei ${}^{288}115$, ${}^{287}115$, and their $\alpha$-decay daughter nuclei. The calculated $\alpha$-decay energies and half-lives agree well with the experimental values and with those of the macroscopic-microscopic FRDM+FY and YPE+WS models. In the mean field Lagrangian, the TMA parameter set is used. Particular emphasis is paid on the influence to both the ground-state properties and energy surfaces introduced by different treatments of pairing. Two different effective interactions in the particle-particle channel, i.e., the constant pairing and the density-independent delta-function interaction, together with the blocking effect are discussed in detail.

arXiv comment17 pages, 5 figures

References in corpus (11)

• Shell structure of superheavy nuclei in self-consistent mean-field models
• A Giant Halo at the Neutron Drip Line
• The pseudo-spin symmetry in Zr and Sn isotopes from the proton drip line to the neutron drip line
• Superheavy Nuclei in the Relativistic Mean Field Theory
• Pairing correlations and resonant states in the relativistic mean field theory
• Relativistic mean field theory for deformed nuclei with pairing correlations
• Resonant continuum in the Hartree-Fock+BCS approximation
• Pairing Gap and Polarisation Effects
• Proton and neutron skins of light nuclei within the Relativistic Mean Field theory
• The surface diffuseness and the spin-orbital splitting in relativistic continuum Hartree-Bogoliubov theory
• The structure of superheavy elements newly discovered in the reaction of ${}^{86}$Kr with ${}^{208}$Pb

Cited by in corpus (10)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Magic numbers for superheavy nuclei in relativistic continuum Hartree-Bogoliubov theory
• Theoretical and experimental αdecay half-lives of the heaviest odd-Z elements and general predictions
• Alpha-decay properties of superheavy elements $Z=113-125$ in the relativistic mean-field theory with vector self-coupling of $\omega$ meson
• Microscopic Description of Super Heavy Nuclei
• Predictions on the alpha decay half lives of Superheavy nuclei with Z = 113 in the range 255 l.e. A l.e. 314
• Relativistic mean field study of the newly discovered $\alpha$-decay chain of ${}^{287}$115
• Decay studies of ${}^{288-287}115$ alpha-decay chains
• A systematic study of neutron magic nuclei with N = 8, 20, 28, 50, 82, and 126 in the relativistic mean field theory
• The stability and the shape of the heaviest nuclei