THE AMPLITUDE OF TRANSFER-IONIZATION IN FAST ATOMIC COLLISIONS.

S. Tolmanov, A. Godunov and J.H. McGuire.

Tulane University, New Orleans, LA 70118, USA

The e-e Thomas amplitude for the collision $p+He\to H+He^{2+}+e$
calculated numerically for the first time. We find that previousely used
peaking approximations lead to large quantative errors. We also find
that the Thomas peak shifted from the position predicted classicaly and
we explain this shift. We find that the exchange and direct amplitudes
are the same in the relatively high energy limit.