The $\beta$ decay of the isomeric and ground state of $^{ 50}$Sc to the semi-magic nucleus $^{ 50}_{ 22}$Ti$_{ 28}$ has been studied using a $^{ 50}$Ca beam delivered to the GRIFFIN $\gamma$-ray spectrometer at the TRIUMF-ISAC facility. $\beta$-decay branching ratios are reported to 16 excited states with a total of 38 $\gamma$-ray transitions linking them. These new data significantly expands the information available over previous studies. Relative intensities are measured to less than 0.001$\%$ that of the strongest transition with the majority of $\gamma$-ray transitions observed here in $\beta$ decay for the first time. The data are compared to shell-model calculations utilizing both phenomenologically-derived interactions employed in the ${ \it pf}$ shell as well as a state-of-the-art, ${ \it ab~initio}$ based interaction built in the valence-space in-medium similarity renormalization group framework.
Categories: nucl-ex
