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

The possibilities of direct production of the isotopes of transfermium nuclei 259,260Md, 260,261No, 261-264Lr, 264,265Rf, 264-268Db, 266-269Sg, 266-271Bh, 267-274Bh, and 270-274Mt in various asymmetric hot fusion-evaporation reactions are studied. The excitation functions of the formation of these isotopes in the αxn 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. [ABSTRACT FROM AUTHOR]