Influence of proton shell closure on production of new superheavy nuclei
A. N. KuzminaBogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, RussiaG. G. AdamianBogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, RussiaN. V. AntonenkoBogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
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Аннотация
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 50Ti+249Cf and 54Cr+248Cm 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.
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