Speaker
Description
The new WISArD (Weak Interaction Studies with 32Argon Decay) experiment reutilises the former WITCH superconducting magnet at ISOLDE to measure the beta-neutrino angular correlation coefficient. 32Ar decays by beta-delayed proton emission. The protons emitted from the recoiling 32Cl daughter nuclei experience thus a Doppler effect, which shifts their energy. The proton and positron detection in the same or in opposite hemispheres of the superconducting magnet will allow the determination of the Doppler shift of the protons emitted. This will be more or less pronounced as a function of the strength of a possible scalar current component in the weak interaction relative to the dominant vector current responsible for “Fermi-type” decay.
The present work gives an overview of the experimental technique and a general description of the new set up.
