Abstract
A total absorption spectrometer, dedicated to the study of very short lived atomic species, has been built and installed at the CERN/ISOLDE mass separator. The beta decays of the neutron-deficient Kr-74 and Sr-76 nuclei have been studied using this new device. The experimental Gamow-Teller strength distributions obtained over the full Q(EC) windows are presented and compared with self-consistent, deformed, HF-BCS-QRPA calculations.