Theoretical study of the synthesis of superheavy nuclei using radioactive beams

The prospects for the synthesis of superheavy nuclei (SHN) using radioactive beams are evaluated quantitatively within the framework of a dinuclear system (DNS) concept. The evaporation-residue cross section (ERCS) for the hot fusion reactions are investigated systematically and compared with the recent results obtained by Loveland [Phys. Rev. C 76, 014612 (2007)]. In most cases the intensities of radioactive beams are significantly less than those of the stable beams, therefore using stable beams is predicted to be the most favorable method for producing SHN.

Figure 1

Contour plot of the driving potential for the reaction systems (a) ${}^{48}\mathrm{Ca}+{}^{244}\mathrm{Pu}$ and (b) ${}^{34}\mathrm{S}+{}^{244}\mathrm{Pu}$ as functions of neutron and proton numbers of fragment 1. The incident channels are indicated by open circles. The thick red lines indicate the valley of the potential.