Isobaric-Analog Study of Zr90

Proton-induced analog resonance reactions have been studied using the target ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$. Excitation functions were measured for elastic and inelastic protons at angles of 70°, 110°, 130°, 150°, and 170°. The inelastic groups detected result from the $0^{+}$ (1.75-MeV), $2^{+}$ (2.18-MeV), $5^{-}$ (2.32-MeV), and the unresolved $4^{-}$ and $3^{-}$ (2.75-MeV) states in ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$. In addition, proton inelastic angular distributions have been taken on and off the more prominent resonances. In order to separate the resonances attributed to the $4^{-}$ and $3^{-}$ (2.75-MeV) proton group, excitation of the $4^{-}$ to $5^{-}$ and $3^{-}$ to $2^{-}$ $\gamma$ rays were measured in a 26-${\mathrm{cm}}^3$ Ge(Li) detector.