LOW-ENERGY TWO CENTER ELECTRONS FROM HEAVY-ION HELIUM COLLISIONS W. Schmitt1, R. Moshammer1, H. Kollmus1, B. Bapat1, M. Schulz1,6, R. Mann2, R. D=F6rner3, Th. Weber3,=20 A. Cassimi4, L. Adoui4, J.P. Grandin4, S. Hagmann5, F. O'Rourke7, R.E. Olson6, J. Ullrich1 1Fakult=E4t f=FCr Physik, Universit=E4t Freiburg, 79104 Freiburg, Germany 2Gesellschaft f=FCr Schwerionenforschung (GSI), 64291 Darmstadt, Germany 3Institut f=FCr Kernphysik, Universit=E4t Frankfurt, 60486 Frankfurt,= Germany 4CIRIL, 14040 Caen, France 5JRM, Kansas State University, Manhattan, USA 6University of Missouri, Rolla, USA 7Queens University, Belfast, United Kingdom Single ionization of helium has been studied with different projectiles covering a wide range of perturbation strengths using the combined recoil-ion electron momentum spectroscopy (Reaction-Microscopes). Within these experiments the complete many-particle final state in momentum space has been mapped with high resolution. Special emphasis is given to the emission of low energy electrons (Ee<100 eV), the dominant contribution to the total cross section.=20