Investigation the fully differential cross section of helium atom single ionization by fast protons impact with three and four-body formalism

In the present work, fully differential cross section of atomic helium ionization by protons impact at high energy ranges is calculated. The calculations have been performed using three-body formalism in first order Born-Faddeev approximation with an active electron model and four body Born approximation. to investigate collision dynamics accurately, has single parameter Hartree Fock as single-electron wave functions approximation, two-electron Hylleraas Silverman are used considering correlation. sections different ejected energies momentum transfers compared available experiment theoretical results. results show that effects electronic correlation considerable range process.‎