Medium spin states inRu99andRu101

In-beam gamma ray spectroscopy studies have been performed to deduce the level structure of ${}_{}{}^{99}{}_{}{}^{}\mathrm{Ru}$ and ${}_{}{}^{101}{}_{}{}^{}\mathrm{Ru}$ below 3 MeV in excitation energy produced via the $\alpha$, n reaction. Excitation functions between 10.0 and 18.0 MeV bombarding energy, together with $\gamma -\gamma$ coincidence and angular distribution measurements, were carried out to determine the level energies and spins. The results are compared to previous work and to the available theoretical calculations.