Influence of temperature-dependent shell corrections on the prediction of production cross sections for superheavy nuclei

¹ School of Physical Science and Technology, Yangzhou University, Yangzhou 225009, China
² School of Physics and Optoelectronics, South-China University of Technology, Guangzhou 510641, China

^* e-mail: chenpenghui@yzu.edu.cn

Published online: 18 October 2024

Abstract

In the framework of the dinuclear system model, we introduce a formula accounting for temperaturedependent shell corrections to assess their influence on the fission barrier calculations and, consequently, the survival probability of excited nuclei. Our approach considers the excitation energy’s effect on the fission barrier, a crucial aspect in determining the likelihood of a nucleus persisting. Leveraging experimental data with associated errors, we constrain the region of the shell correction damping factor. Employing this refined methodology, we predict the production cross sections for the novel superheavy element (SHE) with atomic number Z=119. Specifically, at the ⁵⁴Cr(²⁴³Am,3n)²⁹⁴119 reaction, cross sections are anticipated to range between 3-27 femtobarns (fb), while for the ⁵¹V(²⁴⁸Cm,3n)²⁹⁶119 reaction, they are projected to span 21-180 fb. These predictions offer valuable insights into the formation dynamics of this exotic superheavy element.