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I believe I have found the source of the problem I mentioned in my last post. I am not sure how to fix it though. I believe there is a problem with the physics list used in the "Microdosimetry" example.
Based on some tests I have been running with the Microdosimetry physics list, I noticed that if a particle such as an electron is produced in the "target" region with an energy below the low energy limit for the physics processes in the "world" region, if the particle transitions into the world region, the particle just flys through the world region without interaction. The particle is not killed off and does not deposit it's energy locally.
I need to find a way to get the particle to deposit it's energy locally if the energy of the particle is below the low energy limit for the region it just entetered.
I have attached a diagram to illustrate the problem more clearly.
Any assistance would be greatly appreciated