Résumé : Measurements have been performed to determine inclusive cross sections (d2σddE, dσdE, dσd and σtot) for the production of neutral and light charged particles (LCP) induced by beams of protons of 26.5, 48.5 and 62.9 MeV and alpha's of 25.4, 45.5 and 57.8 MeV incident energies on natSi targets. The secondary LCPs (p, d, t, 3He, α, 6Li, 7Li and 7Be) were detected at angles from 10° to 165 ° in steps of ±10°. Neutrons emitted in these reactions were only recorded in coincidence with, at least, one detected LCP. Some comparisons between theoretical calculations based on the GNASH and TALYS nuclear reaction codes and the experimental results are presented and discussed. © 2005 American Institute of Physics.