Abstract
The heavy odd-odd N = Z nuclei Y-78, Nb-82, Tc-86 have been produced at GANIL by fragmentation of a, 60 MeV/u Mo-92 beam on a natural nicker target. Their lifetime have been measured for the first time, using the identification - implantation and subsequent time correlated beta counting technique at the LISE spectrometer. The obtained half-lives for Y-78, Nb-82, Tc-86 are consistent with the microscopic predictions. These nuclei are good candidates to extend the mass range for the V-ud matrix element evaluation and our experimental results highlight the interest of further investigation of their excited states and beta decay schemes as a function of isospin.