Properties of superheavy isotopes Z=120 and isotones N=184 within the Skyrme-HFB model

TL;DR

This study investigates the properties of superheavy Z=120 isotopes and N=184 isotones using the Skyrme-HFB model, focusing on deformation, fission paths, and toroidal high spin isomers, revealing potential energy minima at high angular momenta.

Contribution

It is the first to identify toroidal high spin isomers in superheavy nuclei within the Skyrme-HFB framework, expanding understanding of nuclear shapes at extreme conditions.

Findings

Toroidal high spin isomers exist for certain superheavy nuclei.

Energy minima appear at high angular momenta in toroidal configurations.

Multiple specific isotopes with identified high spin isomers.

Abstract

We study the nuclear properties of even-even superheavy $Z$=120 isotopes and $N$=184 isotones with the Skyrme Hartree-Fock-Bogoliubov (HFB)approach. Within this model we examine the deformation energy surfaces and two paths to fission: a reflection-symmetric path with elongated fission fragments (sEF) and a reflection-asymmetric path corresponding to elongated fission fragments (aEF). Furthermore, we explore the energy surfaces in the region of very large oblate deformations with toroidal nuclear density distributions. While the energy surfaces of toroidal $Z$=120 isotopes and $N$=184 isotones do not possess energy minima without angular momenta,local energy minima (toroidal high spin isomeric states) appear for many of these superheavy nuclei with specific angular momenta about the symmetry axis. We have theoretically located the toroidal high spin isomers (THSIs) of $^{302}$Og$_{184}$,$^{302}120_{182}$, $^{306}120_{186}$, and $^{306}122_{184}$.