Abstract
The shell structure of nuclei with Z > 104 is studied with modified two-center shell model. Using macroscopic-microscopic approach, the mass excesses and Qα-values are calculated and compared with available experimental data. Our calculations reveal quite strong shell effects at Z = 120 −126 as well as at N = 184. If our predictions for the heaviest nuclei are correct then one can expect the production of evaporation residues with Z ∼ 120 in the reactions 50 Ti+ 249 Cf and 54 Cr+ 248 Cm with the cross sections 23 and 10 fb, respectively. Nuclei with Z = 120 and N = 178 − 182 are expected to have Qα about 11 MeV and life-time of 0.17 ms - 0.16 s.
Highlights
To find ways of synthesis and identification of superheavy nuclei, the study of their structure is necessary [1, 2]
The aim of this work is to apply the microscopic-macroscopic approach based on the two-center shell model TCSM [6] to the SHN and to reveal the trends in the shell effects, nuclear binding energies, Qα-values, quasiparticle states, and the evaporation residue cross sections with Z
The calculations performed with the modified TCSM reveal quite strong shell effects at Z = 120 − 126
Summary
To find ways of synthesis and identification of superheavy nuclei, the study of their structure is necessary [1, 2]. The parameters of the TCSM were set so to describe the spins and parities of the ground state of known heavy nuclei (the rare earth nuclei, actinides, and some superheavy nuclei). This approach has been used in Ref. Note that the spectroscopic study of low-lying one- and two-quasiparticle states, and isomers in the heaviest nuclei [8,9,10,11] is up to date because of the problem of unambiguous identification of new superheavy nuclei [1,12,13,14]
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