2D momentum distribution of electron in transfer ionization of helium atom by fast proton

摘要

2D distribution of momentum components of the ejected electron in the reaction H~++He → H+He~(2+)+e at 630 keV proton is studied both theoretically and experimentally. This allows to unambiguously identify contributions from the shake-off and binary encounter mechanisms of transfer ionization. It is shown that the results are highly sensitive to the quality of the initial-state wave function.