Doubleβdecay to excited states of several medium-heavy nuclei within the renormalized quasiparticle random phase approximation

Abstract

The renormalized proton-neutron quasiparticle random phase approximation approach has been used to study double \ensuremath{\beta} decay matrix elements and associated transition half-lives for neutrino-accompanied double \ensuremath{\beta} decay to the first excited ${2}^{+}$ state for five medium-heavy parent nuclei ${}^{76}$Ge, ${}^{82}$Se, ${}^{96}$Zr, ${}^{100}$Mo, and ${}^{116}$Cd. The results of these calculations are compared with the normal approach and experiments where available. The dependence on the size of the single particle basis is also discussed.