Detailed β-decay study of Ar33

The proton-rich nucleus Ar33 has been studied by detailed proton and γ-ray spectroscopy at the low-energy facility of SPIRAL at GANIL. Proton and γ-ray singles and coincidence measurements allowed to establish a quasicomplete decay scheme of this nucleus. By comparing the proton intensity to different daughter states, tentative spin assignments have been made for some of the states of Cl33. The Gamow-Teller strength distribution is deduced and compared to shell-model calculations and a quenching factor is determined. States close to the isobaric analog state are searched for with respect to isospin mixing. © 2010 The American Physical Society.
This work was partly funded by the Conseil régional d’Aquitaine and the EU through the Human Capital and Mobility program. We acknowledge support from CICYT via contract FPA2007-62179. RDR was supported via a FPI grant.