PROPERTIES OF THE HYPOTHETICAL SPHERICAL SUPERHEAVY NUCLEI

Theoretical results on the ground-state properties of the hypothetical spherical superheavy atomic nuclei are presented and discussed. Even- even isotopes of elements Z = 104 - 120 are considered. Certain conclu sions are also drawn for odd-A and odd-odd superheavy nuclei. Results obtained earlier for even-even deformed superheavy nuclei with Z = 104 - 114 are given for completeness. Equilibrium deformation, nuclear ma ss, alpha-decay energy, alpha-decay half-life, dynamical fission barri er, as well as spontaneous-fission half-life are considered. beta-stab ility of superheavy nuclei is also discussed. The calculations are bas ed on the macroscopic-microscopic model. A multidimensional deformatio n space describing axially symmetric nuclear shapes is used in the ana lysis of masses and decay properties of superheavy nuclei. We determin ed the boundaries of the region of superheavy nuclei which are expecte d to live long enough to be detected after the synthesis in a present- day experimental setup.