Electron as well as positron transport in AMOS are carried out with an analogue single scattering algorithm. Every physical interaction is individually sampled and processed. This method enables a detailed description of the electron path including the hence produced secondary electrons. So this transport code is destined for all high-resolution tasks, i.e. if electron or secondary electron spectra shall be determined in the proximity of boundary surfaces. Another main task can be found in radiobiology where the target structures are in a microscopic scale.
For energies significantly above few MeV, this technique is computationally expensive because a large number of interaction have to be processed. For such problems, a condensed-histories algorithm is being developed. This algorithm combines so-called soft scatterings to multiple scatterings. The influence of latter on the particle's path is taken into account via statistically distributed parameters like the lateral shift and change of direction.