Microscopic Investigation of Ground State Properties and Shape Evolution in Osmium Isotopes

TL;DR

This study uses covariant density functional theory to analyze shape evolution and phase transitions in neutron-rich Osmium isotopes, providing insights into their ground state properties and confirming shape transitions with good model-data agreement.

Contribution

It offers a comprehensive theoretical analysis of shape evolution in Osmium isotopes using multiple density functional models, highlighting phase transitions and ground state properties.

Findings

Identified shape transitions in Osmium isotopes from oblate to prolate.

Achieved good agreement between models and experimental data.

Revealed systematic trends in ground state properties across isotopes.

Abstract

The present study focuses on investigating the shape evolution of neutron-rich even-even Osmium (Os) transitional nuclei within the range of neutron number N = 82 to N = 190. The investigation is conducted using density-dependent meson-nucleon and point-coupling models within the framework of the covariant density functional theory (CDFT). Additionally, the results obtained from the CDFT calculations are compared with those obtained using the relativistic mean-field model with a non-linear meson-nucleon interaction. The potential energy curve for Os isotopes (ranging from $^{158}$Os to $^{260}$Os) is analyzed in order to identify phase shape transitions, such as oblate-spherical-prolate. Furthermore, ground state bulk properties are calculated to gain insights into the structure of Os isotopes. The self-consistent calculations reveal a clear shape transition in the even-even Os isotopes, and overall, good agreement is observed among the different models employed as well as with the available experimental data.