  Half-lives of beta+ decay and electron capture are studied in some selected
superheavy nuclei produced in hot fusion reactions, namely, 290Fl, 293Mc,
294Lv, and 295Ts. The nuclear structure is described microscopically from
deformed self-consistent Skyrme Hartree-Fock mean-field calculations that
include pairing correlations. The sensitivity of the half-lives to deformation
and to the QEC energies, which are still not determined experimentally, are
studied. The results are compared with phenomenological alpha-decay half-lives,
showing that the latter decay mode is dominant in this mass region.
