The electronic stopping process is modeled according to the empirical stopping
model suggested in Sec. 3.3.3. The only physical parameter
required for this model is the impact parameter which is determined when
selecting a collision partner (Sec. 4.4.1). An individual set of empirical
parameters , , and
is applied for each
particle species (Tab. 4.1). For a constant value
of 1 is used for all particle species as suggested in .
Due to the fact that the electronic stopping model implies a dependence on the charge and the mass of the atoms of the target material the electronic stopping power is averaged in case of materials consisting of more than one atom species. The contribution of each atom species is considered according to the stoichiometry of the material.
Additionally a special treatment is applied for multiple collisions. While the local part of the electronic stopping model is calculated just once, the non-local contribution to the electronic stopping model is calculated once for each collision.