2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/14001We calculate the light element production induced by the explosion of an isolated supernova in the ISM. We use a time-dependent model and consider energetic particles accelerated at the forward (process~1) and reverse (process~2) shocks. Both processes are primary, but are shown to underproduce Be and B. The reasons for this failure are analyzed and used to propose a possible alternative, based on the acceleration of particles inside superbubbles.8 pages, 8 figures, proc. of "LiBeB, cosmic rays and gamma-ray line astronomy" (Paris, dec. 1998)Astrophysicstext