Systematics on production of superheavy nuclei $Z=119-122$ in fusion-evaporation reactions

Abstract

The fusion dynamics on the formation of superheavy nuclei is investigated thoroughly within the dinuclear system model. The Monte Carlo approach is implemented into the nucleon transfer process for including all possible orientations, at which the dinuclear system is assumed to be formed at the touching configuration of dinuclear fragments. The production cross sections of superheavy nuclei Cn, Fl, Lv, Ts and Og are calculated and compared with the available data from Dubna. The evaporation residue excitation functions in the channels of pure neutrons and charged particles are analyzed systematically. The combinations with ${}^{44}$Sc, ${}^{48,50}$Ti, ${}^{49,51}$V, ${}^{52,54}$Cr, ${}^{58,62}$Fe and ${}^{62,64}$Ni bombarding the actinide nuclides ${}^{238}$U, ${}^{244}$Pu, ${}^{248}$Cm, ${}^{247,249}$Bk, ${}^{249,251}$Cf, ${}^{252}$Es and ${}^{243}$Am are calculated for producing the superheavy elements with Z=119-122. It is found that the production cross sections sensitively depend on the neutron richness of reaction system. The structure of evaporation residue excitation function is related to the neutron separation energy and fission barrier of compound nucleus.

11 pages, 8 figures

References in corpus (8)

• Synthesis of superheavies: State of affairs and outlooks
• Theoretical study of the synthesis of superheavy nuclei with Z= 119 and 120 in heavy-ion reactions with trans-uranium targets
• Formation of superheavy nuclei in cold fusion reactions
• Production of neutron-rich isotopes around N=126 in multinucleon transfer reactions
• Quasifission and fusion-fission in massive nuclei reactions. Comparison of reactions leading to the Z=120 element
• Production of heavy and superheavy nuclei in massive fusion reactions
• Hyperon Dynamics in Heavy-ion Collisions near threshold energy
• Production mechanism of neutron-deficient actinide isotopes in complete fusion reactions and multinucleon transfer reactions

Cited by in corpus (2)

• Local variations of charge radii for nuclei with even $Z$ from 84 to 120
• Production of neutron-rich heavy nuclei around N = 162 in multinucleon transfer reactions