|Message: Re: Setting tracking cuts for logical volume||Not Logged In (login)|
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I found your problem looking at the code G4UserSpecialCuts::PostStepGetPhysicalInteractionLength. This is likely not documented but it says there:
// min kinetic energy (only for charged particle)
My guess is the user is expected to implement a production range cut for neutral secondaries if he/she doesn't want them to be tracked at all. This ekin special cut applies only to charged particles because only they can drop below a min. kinetic energy during tracking.
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