INTERNUCLEAR POTENTIAL EFFECT ON THE TRIPLY DIFFERENTIAL CROSS SECTION FOR ION-ATOM COLLISION M.D. Sanchez* #, W.R. Cravero* #, and C.R. Garibotti# *Dpto. de Fsica - Universidad Nacional del Sur, (8000) Bahia Blanca, Argentina. #Centro Atomico Bariloche and CONICET, (8400) Bariloche, Argentina. In this work we report CDW-EIS calculations of triply differential cross sections for Proton impact ionization of atomic Hydrogen with the internuclera interaction accounted for in eikonal approximation.