[en] The study of the nuclei far off stability valley is of much interest for testing the nuclear models established for the stable nuclei but also for astrophysics to understand the nucleosynthesis. Experiments aim to measure the mass and lifetime, to build the decay schemes and also to study the structure and the properties of these nuclei. The radioactive beam group focused its research on light neutron-rich nuclei having a halo neutron structure. Mass measurements in N ∼ Z nuclei namely in A ∼ 60-80 proton-rich nuclei, important for understanding the rp process, are mentioned, as well as in nuclei in the ¹⁰⁰Sn region. In the newly obtained ²⁶O and ²⁸O nuclei the lifetimes, the probabilities of emission of one for more neutrons were determined. The data analysis has permitted to determine also for the first time the lifetimes of ^27,29F and ³⁰Ne. Studies of nuclei in the ¹⁰⁰Sn region, near the proton drip line in the ground and isomeric states are now under way. The spectroscopy (energy levels, gamma emissions, etc.) of the neutron-rich nuclei produced by the ³⁶S fragmentation has been carried out in ³¹Ne, ¹⁷B and ²⁹F. Studies by Coulomb excitation of the 2⁺ excited states and associated probability B (E2) in O, Ne, Ni and Zn are now analysed