Yrast transitions of the neutron deficient nucleus ${}^{93}\mathrm{Pd}$ were identified in the $\alpha n$ exit channel of the reaction ${}^{40}\mathrm{Ca}+{}^{58}\mathrm{Ni}$ at $135\text{MeV}$ using the gamma ray spectrometer GASP, the ISIS ball, and the $n$-ring detector system. The relationship of prompt $\gamma \gamma$ coincidences and the selection of $\gamma$ rays coincident with evaporated neutrons and $\alpha$ particles revealed for the first time the decay pattern of the high spin structure of the ${}^{93}\mathrm{Pd}$ nucleus. The spherical shell model calculations restricted to the $\pi ,\nu \left(p_{1∕2},g_{9∕2}\right)$ configuration space are in good accordance with the experimentally deduced level scheme of ${}^{93}\mathrm{Pd}$.

• Received 3 October 2003

DOI:https://doi.org/10.1103/PhysRevC.69.024307