Decay of primary ejectiles by light particles and complex fragments emission in 20,22Ne + 93Nb reactions at 30 MeV/nucleon

The observation of projectile-like fragments with an energy corresponding to the beam velocity turns out to be mostly explained by the break-up of the projectile, the break-up of the ejectile formed by transfer and the decay of the excited projectile. The analysis of two kinds of correlations, light particle-projectile-like fragment and fragment-fragment, is an adequate tool to distinguish the different processes. Significant differences are observed related to the structures of the two projectiles (20Ne and 22Ne). (orig.)