A kinematically complete experiment for transfer ionization in slow
He $^{2+}$ - He collisions

L. Schmidt, V.Mergel, M. Achler, L.Spielberger, O. Jagutzki,
R. Dörner, H. Schmidt-Böcking

Institut für Kernphysik, J.W. Goethe-Universität Frankfurt, Germany

Using COLTRIMS, we measured the transfer ionization He $^{2+}$ + He ->
He$^+$ + He $^{2+}$ + e$^-$ for projectile velocities between 0.5 and 1
and obtained the 3-dimensional momentum distribution for all particles
coincidence. Different cuts and projections in the phase space of the
state show structures which can not be understood at this time.