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Question Conservation of energy for electrons from ionisation 

Forum: Event and Track Management
Date: 26 Apr, 2012
From: <pirkn>

Hello,

I have simulated 2GeV muons hitting a water tank with geant4-09-03-patch-02. In the particle track listing I noticed a secondary electron with KinE=14.8MeV beging produced at a vertex where the muon only loses dE=0.876MeV through ionisation. How can this be? Where does the electron get its energy from?

Find the entire listing is attached, and the excerpt here:

**********************************************************************************
* G4Track Information:   Particle = mu-,   Track ID = 1,   Parent ID = 0
********************************************************************************
Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0     96.6   0.0694  1.1e+03     2e+03        0        0         0       World initStep
   24     93.4     1.66     -466  1.85e+03    0.876     4.17  1.57e+03  DetSimBulk muIoni

********************************************************************************
 G4Track Information:   Particle = e-,   Track ID = 21,   Parent ID = 1
********************************************************************************
Step#    X(mm)    Y(mm)    Z(mm) KinE(MeV)  dE(MeV) StepLeng TrackLeng  NextVolume ProcName
    0     93.4     1.66     -466      14.8        0        0         0  DetSimBulk initStep
    1     94.6     1.09     -473      13.3     1.39     7.07      7.07  DetSimBulk eBrem

Thank you for your help!

Norbert

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2012/04/26/00.21-1427-particle_listing.txt

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1 Feedback: Re: Conservation of energy for electrons from ionisation   (Gumplinger Peter - 26 Apr, 2012)
(_ None: Re: Conservation of energy for electrons from ionisation   (pirkn - 27 Apr, 2012)
(_ Disagree: Re: Conservation of energy for electrons from ionisation   (Gumplinger Peter - 27 Apr, 2012)
1 None: RE: Conservation of energy for electrons from ionisation   (Vladimir Ivantchenko - 28 Apr, 2012)
2 None: Re: Conservation of energy for electrons from ionisation   (michel maire - 28 Apr, 2012)
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