|Message: Is it possible to change physics process type just for a given volume/region?||Not Logged In (login)|
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Dear All, I am using the G4MultipleScattering process in my detector setup. There is an alternative process G4CoulombScattering, which is believed to be better suited for the thin materials. However, switching from G4MultipleScattering to G4CoulombScattering everywhere increses the execution time of my jobs by factor of ~10. Therefore I would like to use G4CoulombScattering only in a few very thin volumes, while employ G4MultipleScattering elsewhere. Is this possible? I did not find such an example, even though the "User's Guide: For Application Developers" (geant 4.8.3, chapter 22.214.171.124) indicates this might be possible:
* The processes described above use physics model classes, which may be combined according to particle energy. It is possible to change the energy range over which different models are valid, and to apply other models specific to particle type, energy range, and G4Region.
(I found a similar posting at http://geant4-hn.slac.stanford.edu:5090/HyperNews/public/get/emprocess/504.html , where an unofficial way of solving a similar problem is provided).
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