Calculated half-lives and kinetic energies for spontaneous emission of heavy ions from nuclei

The most probable decays by spontaneous emission of heavy ions are listed for nuclides with Z = 47--106 and total half-lives>1 μsec. Partial half-lives, branching ratios relative to α decay, kinetic energies, and Q values are estimated by using the analytical superasymmetric fission model, a semiempirical formula for those α-decay lifetimes which have not been measured, and the new Wapstra--Audi mass tables. Numerous ''stable'' nuclides with Z>40 are found to be metastable with respect to the new decay modes. The current experimental status is briefly reviewed