SATURATION EFFECTS IN THE IONISATION OF He BY H+ AND He2+ IMPACT AT INTERMEDIATE ENERGIES G. C. BERNARDI, P. D. FAINSTEIN, C. R. GARIBOTTI et S. SUAREZ J. Phys. Colloques, 50 C1 (1989) C1-189-C1-192 DOI: 10.1051/jphyscol:1989122