Decay Properties of 75-80Zn and Qβ-values of Neutron-Rich Zn and Ga Isotopes

The decays of strongly neutron rich isotopes of Zn have been studied with the primary aim of nuclear mass determinations. The work has also resulted in considerable information on the previously practically unknown level structure of 75,76,77,79,80Ga. Improved Qβ-values are obtained for 75,76,77,78Zn and 76,78,80Ga. The Qβ-values of 79,80Zn are reported for the first time. The experimental results are compared with predicted values of nuclear masses.