When using the PhysicsList of example N04, which contains a 'mostly complete' set of processes, one question and one problem arise. (1) I've been told to set G4LEVELGAMMADATA, but nowhere is written what this variable means and where it should point to. I assume (!) that I have to download one of the optional data sets, but I don't know ... (2) When turning off both, absorption at rest and decay, using /processes/inactivate PiMinusAbsorptionAtRest /processes/inactivate Decay Geant4 crashes when starting a run. By the way: I saw, that there are two methods for handling absorption at rest (for pi- and K-). What's the difference, because they give very different results?
ad 1) The G4LEVELGAMMADATA variable should point to the PhotonEvaporation data. ad 2) Hisaya will be able to help in this. ad 3) There are two classes. One type includes the prompt nucleons, the other one not.
(Problem 2) It is dangerous to inactivate "decay" without any "special" care. Crashes easily occur due to the following reason. 1) Suppose a pion (or any kind of particles which can decay) stop in a material. 2) Normally, it will decay at rest. But decay is inactivated in this case and no process can take care of it. 3) G4SteppingManager::InvokeAtRestDoItProcs assumes that at lease one process can be invoked at rest step. Without process, its behaviour is not defined and sometimes it crashes. I think that crashes can be avoided by fixing G4SteppingManager::InvokeAtRestDoItProcs method. However, the Stepping Manager can only exit Geant4 with warning messages because NO behaviour is defined for particles at rest.
*** Bug 622 has been marked as a duplicate of this bug. *** *** 'kurasige@phys.sci.kobe-u.ac.jp' will be responsible for bug 622. ***
