Comparison of fi-decay and Charge-exchange Reactions in Mirror T =2 Nuclei and Isospin Mixing

We have carried out β decay studies of proton rich nuclei in the fp shell at different laboratories.Here we present our recent results on the decay of Tz =-2 nuclei performed at GANIL and compare them with the Charge Exchange reactions on their stable, mirror-partner targets, performed at RCNP. In one of the cases, the 56Zn - 56Fe pair, a strong isospin mixing has been observed. The results are well reproduced in the framework of Shell Model calculations