Fission half-lives of super-heavy nuclei in a microscopic approach

TL;DR

This paper systematically investigates the fission half-lives of 160 super-heavy nuclei using a microscopic Hartree-Fock-Bogoliubov approach with the Gogny force, analyzing various nuclear configurations and comparing with experimental data.

Contribution

It introduces a comprehensive microscopic analysis of super-heavy nuclei fission properties using advanced HFB methods and multiple wave function symmetries, improving agreement with experiments.

Findings

Accurate predictions of fission barriers and lifetimes.

Enhanced agreement with experimental data.

Insights into the influence of nuclear shape configurations.

Abstract

A systematic study of 160 heavy and super-heavy nuclei is performed in the Hartree-Fock-Bogoliubov approach with the finite range and density dependent Gogny force with the D1S parameter set. We show calculations in several approximations: with axially symmetric and reflexion symmetric wave functions, with axially symmetric and non-reflexion symmetric wave functions and finally some representative examples with triaxial wave functions are also discussed. Relevant properties of the ground state and along the fission path are thoroughly analyzed. Fission barriers, Q$_\alpha$-factors and lifetimes with respect to fission and $\alpha$-decay as well as other observables are discussed. Larger configuration spaces and more general HFB wave functions as compared to previous studies provide a very good agreement with the experimental data.