We have measured coincidences between neutralized projectiles and He recoil ions for 50175-keV proton-helium collisions. From the data we obtained transfer ionization (TI) cross sections differential in the projectile scattering angle. Laboratory scattering angles range from 0 to 2.0 mrad. The experimental method allowed separation of the postcollision charge states of the target atoms. The ratio of the cross sections for TI to the sum of TI and single capture, F, is presented as a function of projectile scattering angle. Comparison is made to previous measurements of this ratio where data is available. The differential cross sections are compared to dynamical classical trajectory Monte Carlo (dCTMC) calculations. Agreement in the shape of the differential cross sections is good between the theory and measurement over the entire energy range.
S. W. Bross et al., "Differential Transfer Ionization Cross Sections for 50175-keV Proton-Helium Collisions," Physical Review A, vol. 50, no. 1, pp. 337-342, American Physical Society (APS), Jul 1994.
The definitive version is available at https://doi.org/10.1103/PhysRevA.50.337
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