One of the long-term programs of nuclear physics is to investigate the prop
erties of the heaviest atomic nuclei. The synthesis of nuclei with Z > 100
always belonged to experiments at laboratory detection limits. The last lar
ge scale upgrade of experimental technique enabled to synthesize new nuclei
with Z = 110, 111, 112. At these experiments no such a significant shell s
tabilizing or isospin effect: was observed, which could eliminate the conti
nuous decrease of cross sections of both "cold" and "hot" fusion reactions.
For the synthesis of nuclei with Z greater than or equal to 113 cross sect
ions below 1 pb are expected. To synthesize new superheavy nuclei with high
er nuclear charge, the laboratory technique, to be used at the proposed rea
ctions, should be again considerably upgraded. New target systems are consi
dered, able to accept higher beam intensities. Some of the new superheavy e
vaporation residues will probably decay by fission. At present no adequate
detection methods are used at superheavy element research, enabling an unam
biguous identification of single fissionable evaporation residues. Possibil
ities to develop such detector systems are presented.