In this chapter we will try to give more detailed information on the different scattering models implemented in SESAME. Presently, there are three different models available: a single scattering model, a hybrid model, and a direct simulation model using dielectric functions.
In case of the single scattering and the hybrid model each combination (compound) of the available elements can be simulated by simply specifying the atomic fractions in the input deck (see Chapter 9.4) whereas in the case of the direct simulation model a material - whether pure element or compound - can be simulated only if the dielectric data for that material is implemented. For available materials which can be simulated using the direct simulation model see Table A.1.
The different models may be also applied in any combination for one structure.
It is possible to apply different models to different regions of one simulation
geometry by specifying the model in dependence of the region in the input deck
by using the MODR(ireg) (see Chapter 9.5) variable. This gives
the user the flexibility to get specific information from one region which can
only be delivered by one of the models but which are not available in other
regions.