Decay spectroscopy of neutron-rich $^{134}$Sb at the CARIBU facility*

Neutron-rich $^{134}$Sb is one of a few isotopes (together with $^{92}$Rb, $^{96}$Y and $^{142}$Cs) that have a large branching ratio to decay to the ground state via a $0^{-}\rightarrow 0^{+}$ first-forbidden transition. Previous measurements have indicated that 97.5\% of the decays of $^{134}$Sb ground state populate the ground state of $^{134}$Te directly. However, a recent experiment using an ion trap indicated that this number may be lower. In order to confirm the $\beta$-decay branching ratios, an experiment was carried out to measure the decay properties of $^{134}$Sb/$^{134m}$Sb using the X-Array (a highly efficient HPGe clover array) and SATURN (a plastic scintillators and tape-transport system) decay-spectroscopy station at the CARIBU radioactive ion-beam facility at Argonne National Laboratory. Results on the analysis will be presented.