A closer insight into classical models for the He atom with two-active electrons

In this work, two classical models which have been proposed to describe He atoms in collision processes by charged particle impact are revisited and analyzed. These are the Heisenberg-core and the energy-bounded classical trajectory Monte Carlo methods. These models avoid the classical autoionization by introducing in the Hamiltonian momentum-dependent terms. The physical implication of different choices of the involved parameters are analyzed as well as their influence at the total cross section level.