|Message: Re: degradation effects?||Not Logged In (login)|
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Physics effects - nuclear interactions, ionisation... will not be changed if 10^6 interactions happens (compare with number of atoms in your volume). The effect for transport will be negligible.
Geant4 providing simulation of particle transport and interaction and leave to users the simulation of detector responses. Detector response may be sensitive to pre-history of the detector. For implementation of detector degradation necessary information from previous events should be stored in user code and reused for the detector response simulation. This was already done in many cases, for example, for LHC detector simulation by each LHC experiment according to properties of their detectors.