Probing the N~Z line via $\beta$-decay

This contribution reports several $\beta$-decay studies performed at ISOLDE On-line Mass Separator at CERN recently for nuclei close to N=Z line. $\beta$ -decay of $^{58}$Zn provides a possibility to compare Gamow-Teller strength extracted from complementary $\beta$-decay studies and charge-exchange reactions. Measurement on $\beta$-decay half-life of $^{70}$Kr shows importance of experimental information in modelling the path of the astrophysical rp-process. Decay of $^{71}$Kr is an example of a mirror $\beta$ -decay and extends the systematics of these particular decays towards highly deformed region close to A=80. (15 refs).