Deformation signature from the Gamow-Teller decay of N=Z nuclei

The $^{76}$Sr (N=Z=38) and the $^{72}$Kr (N=Z=36)$\beta^{+}$ EC decay have been studied at the CERN-ISOLDE PSB facility where their $\beta-\gamma$ and delayed particle decay modes have been investigated. The established decay schemes yield new information on the Gamow- Teller (GT) strength spread over the J$^{\pi}$=1$^{+}$ states in the daughter nuclei. The delayed proton emission of an N=Z nucleus is observed for the first time in the case of $^{76}$Sr. The experimental GT strength intensities and distributions are discussed in the light of the theoretical estimates for oblate and prolate deformations. (6 refs).