Different methods for the identification of short-life nuclei: the Be-8 case

We show all different detection methods for 8Be identification, available in the 4 pi CHIMERA multidetector. The methods here presented are interesting because they can be extended to resonances also in radioactive nuclei at the border of drip lines, in reactions in inverse kinematics that are characterized by small relative angles among the decay products. In particular, an analysis of the kinematic detection method is done by discussing the effect of the angular resolution on the accuracy determination of the energy of the resonance. Various "pile up" identification methods are shown, as the well known delta E-E method, the time of flight technique and pulse shape analysis. The last section is focused on simulations, that show how the energy is shared between alpha-particles emitted by a Be-8 nucleus. A method that tries to recover for the limits in detector angular resolution is also described by investigating its possibilities and uncertainties.