Problem 12

I have a detector geometry with the following levels: World - Detector - Module
(replica) - Plane - SCPlane - Counter(replica) - SCounter. The latter is
sensitive. I hit a mu+ in the middle of the detector. If this muon emits
delta electron in SCounter, after that
aStep->GetPreStepPoint()->GetPhysicalVolume() returns me (on the next step)
ModulePV instead of SCounterPV. For this reason the rest of step in SCounter
remains undigitized.
 The corresponding code can be found in /afs/cern.ch/user/k/kirsanov/publis
psgeant4.tar.gz.
 I took geant4.0.1 from the Web and compiled it on my PC with Linux RedHat 5.1.
CLHEP i took from the Web and compiled (all this one week ago). I used file
configure which is in psgeant4.tar.gz. Libraries are granular. The program i run
like this:
psgeant4 cardg.g4mac.
 I tried to remove ionization from poststep processes: the problem almost
disappears (almost because there is also rather rare pair production).