β-decay studies of107Sb and other neutron-deficient antimony isotopes

Abstract

By using on-line mass separation of residues from heavy-ion-induced fusion-evaporation reactions, we studied the ${\ensuremath{\beta}}^{+}$/EC decay of the neutron-deficient isotopes ${}^{107}$Sb and ${}^{108}$Sb. A search for direct proton decay of ${}^{105}$Sb did not yield a conclusive result. The experimental $\ensuremath{\beta}$-decay half-lives of ${}^{104\ensuremath{-}108}$Sb are discussed with reference to results obtained from quasiparticle random-phase approximations, while the ${}^{108}$Sb${\ensuremath{\rightarrow}}^{108}$Sn and ${}^{107}$Sb${\ensuremath{\rightarrow}}^{107}$Sn level schemes are interpreted in comparison with shell model predictions.