Theoretical study of the synthesis of superheavy nuclei with Z= 119 and 120 in heavy-ion reactions with trans-uranium targets

TL;DR

This study uses a new di-nuclear system model to analyze hot fusion reactions for synthesizing superheavy nuclei with Z=119 and 120, predicting evaporation residue cross sections that align with experimental data and exploring optimal reaction conditions.

Contribution

The paper introduces the DNS-DyPES model for predicting superheavy element synthesis, providing detailed cross section calculations for various projectile-target combinations.

Findings

Maximal ER cross section for 50Ti+249Bk is about 0.11 pb.

ER cross sections increase with mass asymmetry for Z=120 production.

Small ER cross sections for 58Fe+244Pu and 54Cr+248Cm, larger for 50Ti+249Cf and 50Ti+251Cf.

Abstract

By using a newly developed di-nuclear system model with a dynamical potential energy surface---the DNS-DyPES model, hot fusion reactions for synthesizing superheavy nuclei (SHN) with the charge number Z = 112-120 are studied. The calculated evaporation residue cross sections are in good agreement with available data. In the reaction 50Ti+249Bk -> (299-x)119 + xn, the maximal evaporation residue (ER) cross section is found to be about 0.11 pb for the 4n-emission channel. For projectile-target combinations producing SHN with Z=120, the ER cross section increases with the mass asymmetry in the incident channel increasing. The maximal ER cross sections for 58Fe+244Pu and 54Cr + 248Cm are relatively small (less than 0.01 pb) and those for 50Ti+249Cf and 50Ti+251Cf are about 0.05 and 0.25 pb, respectively.