ELECTRON-CAPTURE BY FULLY STRIPPED HIGH-Z PROJECTILES FROM THE HYDROGEN-ATOM

A single-channel distorted-wave approximation is used to calculate the one-electron capture cross section into an arbitrary state (nlm) of T i22+, V23+, and Fe26+ from the ground state of a hydrogen atom. Since the interaction between the heavy projectile and the target electron i s stronger, we represent the initial-channel wave function by a contin uum distorted wave while the wave function in the final channel is tak en to be a traveling atomic orbital. The nth partial cross sections ar e found to be in qualitative agreement with previous calculations for some other systems. It is found that at high energies the value n(max) , where the nth partial cross section is maximum, is larger by a few s teps than obtained from the n(max)=Z(3/4) model. However, for a fixed projectile n(max) moves towards the smaller values as the energy incre ases. The l dependence of the cross sections are also studied at diffe rent energies at the corresponding n(max). We have further studied the mth partial cross sections at various energies and at the correspondi ng n(max) for several l values. It is found that the contributions fro m higher m values are decreasing rapidly for m>5.