High-spin states in ${}^{97,98}\mathrm{Rh}\hspace{0.5em}\mathrm{}(Z=45\mathrm{})\mathrm{}$ were populated via the ${}^{65}\mathrm{Cu}{(}^{36}\mathrm{S},{xn)}^{97,98}\mathrm{Rh}\hspace{0.5em}\mathrm{}(x=4,3\mathrm{})\mathrm{}$ fusion-evaporation reactions. More than 40 additional transitions have been identified and placed in the decay schemes of these nuclei. The level scheme of ${}^{97}\mathrm{Rh}$ has been extended up to tentative spins of $J^{\pi }{=39/2\mathrm{}}^{+}{,37/2\mathrm{}}^{-},$ and the placement of some of the previously known transitions has been revised. The level structure of ${}^{97}\mathrm{Rh}$ indicates a single-particle nature and the observed levels are reproduced well by spherical shell-model calculations. The level scheme of ${}^{98}\mathrm{Rh}$ has been extended up to spins $J\sim 20ħ$ and up to an excitation energy of ∼10 MeV. The low-spin structure of ${}^{98}\mathrm{Rh}(J<~10ħ),$ appears to indicate also a single-particle structure, as supported by the stretched coupling scheme ${[}^{97}\mathrm{Rh}{(J}^{\prime })\otimes \nu {(d}_{5/2}{)=}^{98}\mathrm{Rh}\mathrm{}(J\left)\mathrm{}\right].$

• Received 7 July 1998

DOI:https://doi.org/10.1103/PhysRevC.58.3243