Atomic masses of 57Cu and 59Zn

The Q values of the reactions 58Ni(7Li,8He)57Cu, Q = -29.56(5) MeV, and 58Ni(p,,π-)59Zn, Q = -144.74(4) MeV, were measured. The measurements allowed the mass excesses of 57Cu and 59Zn to be determined. The low-lying level structure of these nuclei was also studied. The mass excesses of these T/sub xz/ = -1/2 nuclei allowed the Garvey-Kelson charge symmetric mass predictions to be extended to Zn isotopes, systematics of Gamow-Teller matrix elements and quenching of the sigmatau operator to be extended to the 2p3/2 orbit, and the systematics on the Nolen-Schiffer anomaly extended to the A = 59 mirror pair. The mass excess and structure of 57Cu was also used to recalculate rp-process nucleosynthesis for A > 56