Spectroscopy of excited states inMo102andRu106

Excited states in the transitional nuclei ${}_{}{}^{102}{}_{}{}^{}\mathrm{Mo}$ and ${}_{}{}^{106}{}_{}{}^{}\mathrm{Ru}$ have been populated in ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ induced two neutron transfer reactions at bombarding energies around 5 MeV/nucleon. The succeeding $\gamma$ decay was measured employing a particle-$\gamma$ coincidence technique in which the ejectiles were identified with a quadrupole-three-dipole magnetic spectrograph. This method is especially suited for studying the decay modes of regions with selected excitation energy and spin. A characteristic evolution in the population of known states ($I^{\pi }\le 4^{+}$) with changing excitation energy was observed. Previously unknown $\gamma$ transitions are attributed to the decay of $6^{+}$ and $8^{+}$ yrast states in ${}_{}{}^{102}{}_{}{}^{}\mathrm{Mo}$ and ${}_{}{}^{106}{}_{}{}^{}\mathrm{Ru}$, respectively.