  The half-lives of the Tz = -2, 56Zn and Tz = -1, 58Zn isotopes and other
nuclei were measured in a {\beta}-decay experiment at GANIL. The energy levels
populated by the 56Zn {\beta} decay were determined. The 56Zn results are
compared with the results of the mirror process, the charge exchange reaction
56Fe(3He,t)56Co.
