Weak interaction studies using a Paul trap

New developments in ion cooling and ion bunching allow the trapping of radi oactive ions from a low energy beam, in a very short time scale and with ve ry good efficiency. The performances of Radio Frequency Quadrupole (RFQ) co olers, recently developed in several laboratories in Europe and USA, are no w better known. In the present study, a RFQ device will be used to inject H e-6(+) ions in a transparent Paul trap. The ion beam will be delivered by t he SPIRAL facility at GANIL. The careful measurement of the beta -recoil io n coincidence spectrum is sensitive to the angular correlation parameter a, which depends on the coupling constants of the weak hamiltonian. It should be equal to -1/3 if the interaction is only of axial vector type (V-A theo ry). Deviation from this value would imply a new tensor-like interaction in volving a new exchange boson thus introducing new physics beyond the Standa rd Model.