Transition Rates between Mixed Symmetry States: First Measurement in 94 Mo

The nucleus ${}^{94}\mathrm{Mo}$ was investigated using a powerful combination of $\ensuremath{\gamma}$-singles photon scattering experiments and $\ensuremath{\gamma}\ensuremath{\gamma}$-coincidence studies following the $\ensuremath{\beta}$ decay of ${}^{94}{\mathrm{Tc}}^{m}$. The data survey short-lived ${J}^{\ensuremath{\pi}}{\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1}^{+}{,2}^{+}$ states and include branching ratios, $E2/M1$ mixing ratios, lifetimes, and transition strengths. The proton-neutron mixed-symmetry (MS) ${1}^{+}$ scissors mode and the ${2}^{+}$ MS state are identified from $M1$ strengths. A $\ensuremath{\gamma}$ transition between MS states was observed and its rate was measured. Nine $M1$ and $E2$ strengths involving MS states agree with the O(6) limit of the interacting boson model-2 using the proton boson $E2$ charge as the only free parameter.