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Forum: Processes Involving Optical Photons
Re: Question G4DynamicParticle - Energy and momentum (Beatrice Panico)
Re: Feedback Re: G4DynamicParticle - Energy and momentum (Gumplinger Peter)
Date: 31 Jul, 2013
From: Beatrice Panico <Beatrice Panico>

Hi, the code I use is effectively the following

  G4VParticleChange* FDsimG4OpBoundaryProcess::PostStepDoIt(const G4Track& aTrack, const G4Step& aStep)
  {
   ...

   const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
	thePhotonMomentum = aParticle->GetTotalMomentum();
   ...
  }

The problem is that I pass the energy in the setting and I find a different value in this point. Your answer suggests to me that the code is correct and that there is no additional factor to consider, but I'm asking why I don't have any problem with previous geant version?

Thanks Beatrice

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