Possibilities of production of transfermium nuclei in charged-particle evaporation channels

Abstract

The possibilities of direct production of the isotopes of transfermium nuclei $^{259,260}\mathrm{Md}, ^{260,261}\mathrm{No}, ^{261--264}\mathrm{Lr}, ^{264,265}\mathrm{Rf}, ^{264--268}\mathrm{Db}, ^{266--269}\mathrm{Sg}, ^{266--271}\mathrm{Bh}, ^{267--274}\mathrm{Hs}$, and $^{270--274}\mathrm{Mt}$ in various asymmetric hot fusion-evaporation reactions are studied. The excitation functions of the formation of these isotopes in the $\ensuremath{\alpha}xn$ and $pxn$ evaporation channels are predicted for the first time. The optimal reaction partners and conditions for the synthesis of new isotopes are suggested. The products of the suggested reactions can fill a gap of unknown isotopes between the isotopes of heaviest nuclei obtained in the $xn$ evaporation channels of the cold and hot complete fusion reactions.