Mass of ${}_{}{}^{59}{}_{}{}^{}\mathrm{Zn}$

The ground state $Q$ value of the reaction ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}(\mathrm{p}, {\pi }^{-}){}_{}{}^{59}{}_{}{}^{}\mathrm{Zn}$ has been measured with $E_{\mathrm{p}}=190\mathrm{}$ MeV. The measured $Q$ value was -144.735(40) MeV and the cross section at 30 deg was found to be 0.080(20) nb/sr. Also measured was the low-lying level structure of ${}_{}{}^{59}{}_{}{}^{}\mathrm{Zn}$ and an upper limit on the reaction cross section for ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(\mathrm{p}, {\pi }^{-})$ going to the ground state of ${}_{}{}^{41}{}_{}{}^{}\mathrm{Ti}$. The measured mass of ${}_{}{}^{59}{}_{}{}^{}\mathrm{Zn}$ was used to study Coulomb energy systematics.

NUCLEAR REACTIONS ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}(\mathrm{p}, {\pi }^{-}){}_{}{}^{59}{}_{}{}^{}\mathrm{Zn}$, ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(\mathrm{p}, {\pi }^{-}){}_{}{}^{41}{}_{}{}^{}\mathrm{Ti}$, $E_{\mathrm{p}}=190\mathrm{}$ MeV; measured ${}_{}{}^{59}{}_{}{}^{}\mathrm{Zn}$ mass, low-lying energy levels; calculated $\mathrm{ft}$ values, $\sigma$. Studied Coulomb energy systematics.