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Question dE column in verbose output 

Forum: Event and Track Management
Date: 18 Dec, 2015
From: Alexander Leder <Alexander Leder>

I have been working on some GEANT4 and looking at the verbose output (shown below), when I noticed that there was something that did not seem to be quite right, namely. For numerous steps in the simulation the dE, which I assume to be the energy deposited/lost in that step, is greater than the kenetic energy of the particle but the particle continues onwards. How is this possible, shouldn't the particle come to a stop once the dE exceeds the remaining kenetic energy? Please refer to step number 209, 212 and 213 for examples of this. Thanks everyone.

Output: *********************************************************************************************************

* G4Track Information: Particle = neutron, Track ID = 1, Parent ID = 0

*********************************************************************************************************

Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName

0 -1.65e+03 20.6 0 2.45 0 0 0 PVcoffeecan initStep

1 -1.64e+03 8.24 -13.5 0.799 0 19.3 19.3 PVcoffeecan hadElastic

... ... ...

208 -2.1e+03 1.06e+03 -1.16e+03 1.24e-07 1.14e-08 11 3.5e+03 PVinbetweenWall hadElastic

209 -2.1e+03 1.07e+03 -1.16e+03 4.67e-08 8.79e-08 2.72 3.5e+03 PVinbetweenWall hadElastic

210 -2.1e+03 1.07e+03 -1.15e+03 5.27e-08 1.27e-08 1.73 3.5e+03 PVinbetweenWall hadElastic

211 -2.1e+03 1.07e+03 -1.15e+03 6.82e-08 3.77e-08 4.06 3.5e+03 PVinbetweenWall hadElastic

212 -2.08e+03 1.06e+03 -1.15e+03 5.13e-08 8.13e-08 22 3.53e+03 PVinbetweenWall hadElastic

213 -2.07e+03 1.06e+03 -1.15e+03 4.13e-08 4.81e-08 3.06 3.53e+03 PVinbetweenWall hadElastic

214 -2.07e+03 1.06e+03 -1.15e+03 4.13e-08 0 6.06 3.54e+03 World Transportation

215 -162 62.7 -994 4.13e-08 0 2.16e+03 5.69e+03 PV poly: 144.5cm to 161.9cm Transportation 216 -155 59.1 -993 0 0 7.89 5.7e+03 PV poly: 144.5cm to 161.9cm nCapture

:----- List of 2ndaries - #SpawnInStep=  4(Rest= 0,Along= 0,Post= 4), #SpawnTotal= 10 ---------------
:      -155      59.1      -993      5.72              gamma
:      -155      59.1      -993      3.74              gamma
:      -155      59.1      -993     0.517              gamma
:      -155      59.1      -993  0.000639               Cl36
:----------------------------------------------------------------- 

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1 Feedback: Re: dE column in verbose output   (Gumplinger Peter - 07 Jan, 2016)
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