Decays ofSn134andO−Sb134

The first measurements of γ rays following the decays of ${}_{}{}^{134}{}_{}{}^{}\mathrm{Sn}$ and the $0^{\mathrm{-}}$ isomer of ${}_{}{}^{134}{}_{}{}^{}\mathrm{Sb}$ are reported. The decay schemes have been constructed using the γ-ray data in combination with results from delayed neutron spectroscopy. Both decays are dominated by the first forbidden ground state β transitions. All observed levels can be interpreted in terms of the shell model. The energy of the (ν${\mathit{h}}_{9/2}$π${\mathit{h}}_{11/2}$)$1^{+}$ state in ${}_{}{}^{134}{}_{}{}^{}\mathrm{Sb}$ was found to be 3.85 MeV, implying a n-p interaction energy which is less than that of the g orbitals in very neutron-rich isotopes of In.