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

We have investigated the cusp resulting from electron capture to the c ontinuum of 1.25-5 MeV amu-1 fully stripped hydrogen and oxygen as a f unction of the collision energy and the detector angular resolution th eta0. It is revealed that the characteristic cusp shape parameters dep end strongly on the experimental resolution. Our experimental data are compared with the second-order Born theory and the impulse approximat ion. Both theories confirm the theta0 dependence of the shape paramete rs and give a reasonable description of the cusp asymmetry. However, t heory tends to overestimate the absolute cross sections, in particular in the case of oxygen.