|Message: Re: Scintillation in LXe example (extended, optical)||Not Logged In (login)|
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> My question is: Where do the optical photons come from? From the lines I > coded, I get the output, that their creator process is Scintillation. > Nevertheless, the muon itself does not undergo the process > Scintillation.
What you see in the tracking verbose is the process that defined the step for the muon. Scintillation rarely defines the step for a charge particle and so you see muon ionization. That doesn't mean that ionization is the only process that happened during a step. To find all the processes acting during a step you need to code a bit more convoluted logic (which can be found in several examples).
> Is the 0th step of a secondary the exact location of its creation?
Yes. BTW, you'd be better off coding your logic in StackingAction where you don't have to worry about step numbers.