H++He scattering at 0.5 MeV has been investigated using a coincidence technique that completely determines the three-body transverse momentum exchange in single ionization collisions. Three scattering regions could be distinctly recognized that are dominated by proton"helium-nucleus, proton-electron, or electron"helium-nucleus interactions. Calculations and the experimental data show that the coupling between the electronic and nuclear degrees of freedom is required to understand the dynamics for more than 97% of the ionizing collisions. © 1989 The American Physical Society.
R. Dörner et al., "Three-body Interactions In Proton-helium Angular Scattering," Physical Review Letters, vol. 63, no. 2, pp. 147 - 150, American Physical Society, Jan 1989.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.63.147
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01 Jan 1989