I get an output like: ********************************************************************************************************* * G4Track Information: Particle = gamma, Track ID = 1, Parent ID = 0 ********************************************************************************************************* Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName 0 0 0 0 0.511 0 0 0 World initStep 1 125 37.6 0 0.511 0 131 131 Crystal Transportation 2 125 37.6 0 0.511 0 0 131 World Transportation 3 125 37.6 0 0.511 0 0 131 Crystal Transportation 4 125 37.6 0 0.511 0 0 131 World Transportation 5 125 37.6 0 0.511 0 0 131 Crystal Transportation 6 125 37.6 0 0.511 0 0 131 World Transportation and this goes on for ever. It keeps going in and out of the volume "Crystal". Is this due to a precision problem? I've checked my geometry which is rather simple and I think it's correct.
For conditions see description of report #214. Note however that the amount of information in this report is not sufficient to allow us to reproduce or understand it.