Abstract
Double-beta decays of 70 Zn, 86 Kr, 94 Zr, 104 Ru, 110 Pd and 124 Sn to the final ground states and the decays of 110 Pd and 124 Sn to the excited states in 110 Cd and 124 Te are studied in the framework of the proton–neutron quasiparticle random-phase approximation (pnQRPA) combined with the multiple-commutator model (MCM) for description of decays to the excited final states. Reasonably large single-particle model spaces and G-matrix-based effective nuclear forces are used to compute the relevant nuclear matrix elements and decay half-lives. The present study is among the very few that have been dedicated to double-beta decays of these nuclei, although the associated double-beta Q values exceed 1.0 MeV for the ground-state decays.
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