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Forum: Event and Track Management
Re: Question Energy Conservation Problem (Gianfranco Gargano)
Date: 22 Mar, 2011
From: michel maire <michel maire>

On Mon, 21 Mar 2011 18:50:07 GMT, Gianfranco Gargano wrote:
> Hy, I'm trying to simulate a 150 MeV proton in a water cube. There's a
> strange effect: the sum of all energies deposed in the water cube is not
> 150 MeV. I have considered the energy which escape from the water cube
> (neutrons or gammas), but anyway seems that in the last proton
> interaction near 15 MeV disappear. I'm using an energy cut value of
> 0.01mm and no step max limitation. I've used the physics list of the
> ProtonTherapy example.
> 

  I invite you to run TestEm7 (in extended/electromagnetic) with attached macro.
  You will get following output and attached plots :

  The run consists of 10000 proton of 150 MeV through 20 cm  of G4_WATER

  Projected Range= 15.8575 cm    rms= 1.74944 mm 
  Mean number of primary steps = 66.7172
  Total energy deposit= 150 MeV
  niel energy deposit = 0 eV 

  cheers,  michel

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/03/22/04.48-47106-gargano.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/03/22/04.49-33789-edep.gif
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/03/22/04.49-69819-range.gif

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1 None: Re: Energy Conservation Problem   (Loc Grevillot - 22 Mar, 2011)
1 None: Re: Energy Conservation Problem   (Gianfranco Gargano - 22 Mar, 2011)
1 None: Re: Energy Conservation Problem   (Gianfranco Gargano - 22 Mar, 2011)
2 None: Re: Energy Conservation Problem   (Loc Grevillot - 22 Mar, 2011)
... 1 Message(s)
2 None: Re: Energy Conservation Problem   (michel maire - 22 Mar, 2011)
1 Warning: Re: Energy Conservation Problem   (Vladimir Ivanchenko - 22 Mar, 2011)
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