ELECTRON-CAPTURE TO THE CONTINUUM IN COLLISIONS OF BARE PROJECTILES WITH NE TARGETS

We have investigated the cusp resulting from electron capture to the continuum of 1.25-5 MeV amu-1 fully stripped hydrogen and oxygen as a function of the collision energy and the detector angular resolution theta0. It is revealed that the characteristic cusp shape parameters depend strongly on the experimental resolution. Our experimental data are compared with the second-order Born theory and the impulse approximation. Both theories confirm the theta0 dependence of the shape parameters and give a reasonable description of the cusp asymmetry. However, theory tends to overestimate the absolute cross sections, in particular in the case of oxygen.