Abstract
Decay properties and stability of heaviest nuclei with Z ≤ 132 are studied within the macro-microscopical approach for nuclear ground-state masses. We use phenomenological relations for the half-lives with respect to α-decay, β-decay and spontaneous fission. Our calculations demonstrate that the β-stable isotopes 291Cn and 293Cn with a half-life of about 100 years are the longest-living superheavy nuclei located on the first island of stability. We found the second island of stability of superheavy nuclei in the region of Z ≈ 124 and N ≈ 198. It is separated from the “continent” by the “gulf” of short-living nuclei with half-lives shorted than 1 μs.
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