[en] It has been found, in measurements of fully stripped ions on rare gas targets, that current theories of electron capture to continuum states in hydrogenic approximation give a different projectile Z dependence from that observed experimentally. It is therefore proposed to study the projectile Z, velocity, angular, and charge state dependence of charge exchange to continuum states for H⁺, C⁶⁺, and O⁸⁺ ions on atomic hydrogen. The previously obtained results are discussed by way of background. Some technical details concerning work done in connection with the proposed experiment are given. An exploratory spectrum of continuum capture electrons from 234-MeV Ar¹⁸⁺ on H₂ is shown. 7 figures