[en] In the last years we have developed a technique, which permits the identification of single nuclei with lifetimes down to 10^-₆ s and production cross sections far below the nanobarn region. At SHIP we investigated the elements Fm, Md, 104, 105, 107, and 109 by fusion of Pb or Bi nuclei with ₄₀Ar, ₅₀Ti, ₅₄Cr, or ₅₈Fe projectiles, respectively. The projectile energies were chosen close to the Coulomb-barrier. With these target-projectile combinations, cold compound systems with excitation energies of 20 MeV and less could be formed. So even for the heaviest and most fragile nuclei a small but reasonable chance exists to survive the strong fission competition in the deexcitation of the compound system. (orig./HSI)