Search

Multinucleon transfer mechanisms near barrier collisions between very heavy nuclei are investigated in the framework of the improved dinuclear system model by considering the influence of orientation effects combined with statistical model code gemini++. Several transfer reactions for different actinide targets ($^{238}\mathrm{U},^{248}\mathrm{Cm}$, and $^{249}\mathrm{Cf}$) are studied in detail. One notices that the isotopic distributions of the above-target products decrease drastically by a factor of 10 per proton, which is moved from projectile to target. However, the calculated and measured results show that the larger production cross sections above targetlike fragments can be produced by using the heaviest available target. The predicted cross sections and excitation functions of the new transfermium isotopes may be useful for future experiments.

Multinucleon transfer cross sections around targetlike fragments of the $^{58}\mathrm{Ni}+^{208}\mathrm{Pb}$ reaction and the $^{64}\mathrm{Ni}+^{207,208}\mathrm{Pb}$ reactions were calculated by the improved dinuclear system $\mathrm{model}+\mathrm{GEMINI}++$. One finds that the $^{64}\mathrm{Ni}+^{208}\mathrm{Pb}$ reaction is more favorable to obtain neutron-rich nuclei as compared to the $^{58}\mathrm{Ni}+^{208}\mathrm{Pb}$ and $^{64}\mathrm{Ni}+^{207}\mathrm{Pb}$ reactions. That is because the difference of injection point position on the potential energy surface has a significant influence on the transfer of protons and neutrons in multinucleon transfer reaction. The effect of the entrance channel on transfer cross sections was predicted and analyzed by $^{58,64,70}\mathrm{Ni}+^{198}\mathrm{Pt}$ and $^{86,91,102}\mathrm{Kr}+^{208}\mathrm{Pb}$ reactions.

The alpha-decay half-lives of recently synthesized superheavy nuclei (SHN) are investigated by employing a generalized liquid drop model (GLDM) and Royer's analytical formula. The excellent agreement with the experimental data indicates the GLDM and the analytical formula are useful tools to investigate alpha-decay half-lives.The competition between alpha decay and spontaneous fission is analyzed in detail and alpha-decay half-lives and decay modes are predicted for the unknown nuclei (293,295-297)Og.