Alpha-decay and spontaneous fission half-lives of super-heavy nuclei around the doubly magic nucleus270Hs

I Silisteanu,C I Anghel

doi:10.1051/epjconf/201610707004

Abstract

The α-decay and spontaneous fission half-lives of nuclei around 270 Hs are calculated with formulas derived from an in-depth analysis of the available experimental data and of results of theoretical models. The parameters of these formulas result from the fit of half-lives with respect to the reaction energies, the height of the SF barrier and the fissionability. The calculated partial and total half-lives are compared with the experimental data and results of other approximations. Half-life predictions are made for many unknown nuclei.

Highlights

The quantity and quality of experimental data on the production and decay of the SHN have increased considerably in the last two decades [1,2,3,4,5,6,7,8,9,10,11,12,13]
Systematic studies of the existing data are revealing new reaction mechanisms, a rich diversity of nuclear structures involving weakly bound states coupled to an environment of scattering states and new competing decay modes that are challenging our understanding of the nucleus at its limits of stability
The calculated α-decay half-lives are greater than the estimates based on previous predicted Qα-values of models developed in Refs. [14, 20,21,22]

Summary

Introduction

The quantity and quality of experimental data on the production and decay of the SHN have increased considerably in the last two decades [1,2,3,4,5,6,7,8,9,10,11,12,13]. Systematic studies of the existing data are revealing new reaction mechanisms, a rich diversity of nuclear structures involving weakly bound states coupled to an environment of scattering states and new competing decay modes that are challenging our understanding of the nucleus at its limits of stability. Such studies have provided the access to the basic properties of SHN: masses, lifetimes, reaction energies, emission rates, and the possibility to predict decay properties and nuclear structure of not yet produced SHN. Our main aim is to correlate on solid theoretical basis the decay data (energy levels, reactions energies, and half-lives) with the current information on the microscopic nuclear structure and the reaction decay mechanism

Formalism

Results

Conclusions