For the first time we investigated in a kinematically complete experiment the ionization of helium in collisions with H2+-molecular ions at 1 MeV. Using two separate detectors, the orientation of the projectile H2+-molecular ions was determined at the instance of the collision. The electron angular distribution was measured by a "Reaction Microscope". The observed structures are found in agreement with theoretical calculations, indicating that the ionized electron of He shows a slight preferential emission direction parallel to the molecular axis.
S. Zhang and J. Suske and D. Fischer and K. U. Kuehnel and S. Hagmann and A. B. Voitkiv and B. Najjari and A. Krauss and R. Moshammer and J. H. Ullrich and X. Ma, "Electron Angular Distributions in He Single Ionization Impact by H2+ Ions at 1 MeV," Journal of Physics: Conference Series, vol. 185, no. 1, Institute of Physics - IOP Publishing, Jan 2009.
The definitive version is available at https://doi.org/10.1088/1742-6596/185/1/012059
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