The level scheme of ${}_{}{}^{57}{}_{}{}^{}\mathrm{Cu}$ is investigated via the ${}_{}{}^1{}_{}{}^{}\mathrm{H}$${(}^{58}$Ni${,}^{57}$Cu-γ)2n reaction by using the recoil mass spectrometer MARS at the Texas A&M Cyclotron Institute. Three low-lying excited states are observed in ${}_{}{}^{57}{}_{}{}^{}\mathrm{Cu}$ at 1028 ± 4, 1106 ± 4, and 2398 ± 10 keV. The results are compared with well known excited states of the mirror nucleus ${}_{}{}^{57}{}_{}{}^{}\mathrm{Ni}$. The measured excited states of ${}_{}{}^{57}{}_{}{}^{}\mathrm{Cu}$ allow recalculation of the astrophysical reaction rate for the stellar radiative proton capture reaction ${}_{}{}^{56}{}_{}{}^{}\mathrm{Ni}$(p,γ${)}^{57}$Cu. © 1996 The American Physical Society.

• Received 10 July 1995

DOI:https://doi.org/10.1103/PhysRevC.53.982