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Question How to get charge of a tracked nucleus 

Forum: Particles
Date: 15 Sep, 2003
From: Ivana Hrivnacova <Ivana Hrivnacova>

Hi,

I'd like to get the charge of the tracked nuclei; I tried on modified example N04 this:

In ExN04TrackingAction::PreUserTrackingAction(const G4Track* aTrack)
I added this printing
  // Track charge
  G4ParticleDefinition* particleDefinition = aTrack->GetDefinition();
  if (particleDefinition->GetParticleType() == "nucleus") {
    G4int a = particleDefinition->GetBaryonNumber();
    G4int z = G4int(particleDefinition->GetPDGCharge()/eplus);
    G4int q = G4int(aTrack->GetDynamicParticle()->GetCharge()/eplus);
    G4cout << "==================================================" << G4endl;
    G4cout << "Nucleus:  a=" << a << "  z=" << z  << "  q=" << q << G4endl;
    G4cout << G4endl;
  }  

and I commented out setting of the stacking and stepping actions in main and changed the primary generator action to track 1 TeV proton to get some nuclei produced. The resulting output looks strange - there appear nuclei with Q > Z,A:

Start Run processing.

==================================================

Nucleus:  a=205  z=81  q=6561

==================================================

Nucleus:  a=207  z=82  q=32

==================================================

Nucleus:  a=4  z=2  q=4

 Is something wrong in the code above?

 Thank you,

 Ivana Hrivnacova  

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