2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142291A proposal is made by the University College of London Group [1] for measuring the target-ionization cross sections in Ps and atom scattering. We calculate the corresponding theoretical data for Ps-H and Ps-He systems including the effect of exchange on Coulomb-Born approximation for the projectile-elastic and projectile-inelastic processes and report the total target-ionization cross sections for the first time.11 pages, 4 figures, 1 table, XIV International positron Workshop at UK (2007)Atomic Physicstext