|Message: Re: Reference physics lists + StepLimiter||Not Logged In (login)|
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For a silicon detector we have following processes:
1) energy loss of changed particles; because silicon layer is thin fluctuations are close to Landau.
2) energy deposition is not equal to the energy loss because energetic delta-electrons leave this thin layer; energy deposition has a tail but the shape is not the same as for the energy loss.
3) electron/hole creation inside sensitive volume; in litrature there is established value 3.66 eV per pair for silicon; number of pairs fluctuate with Gaussian widths smaller that typical 1/sqrt(N) - corresponding factor also empirical.
4) processes of drifting and shape of electronic signal very depend on a concrete detector and electronic chain.
Geant4 provides simulation of 1) and 2) and as you correctly mension a helper class to make 3). This helper class depends on two constants specific for each material. In general, 3) and 4) should be done in user digitisation code.
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