Precision measurements in β-decay with radioactive low energy beams

The availability of radioactive ion beams with high intensity and relatively high purity at several RIB facilities around the world has motivated a number of new precision experiments in nuclear β-decay with the aim to probe the structure of the weak interaction or to test the underlying fundamental symmetries of the standard electroweak model. At GANIL the plans for the extension of one of the SPIRAL beam lines and the construction of a dedicated area to host low energy experiments open up unique conditions for such measurements. This note reviews one of the topics which will be addressed by these experiments. (authors)