Half-lives of the odd-odd N=Z nuclei Y-78, Nb-82, Tc-86

The heavy odd-odd N = Z nuclei Rb-74, Y-78, Nb-82 Tc-86 have been produced at GANIL by fragmentation of a 60 MeV/u Mo-92 beam on a natural nickel targ et. The species of interest were selected and identified by their energy lo ss in a silicon detector and their time of flight through the LISE spectrom eter. The ions were implanted in a silicon strip detector in which their be ta-decay was observed. The measured half-lives for Y-78, Nb-82, Tc-86 corre spond to superallowed transitions and may sign Fermi transitions on the bas is of log ft values. Our experimental results pave the way for further and more precise measurements of these nuclei.