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Question Re: Water VS G4_WATER 

Forum: Geometry
Re: Question Water VS G4_WATER (Daniel Sánchez Parcerisa)
Re: Idea Re: Water VS G4_WATER (Vladimir Ivanchenko)
Date: 03 Feb, 2010
From: Daniel Sánchez Parcerisa <Daniel Sánchez Parcerisa>

OK, thanks.

Trying with more energies, one can see that hand-made water always results in a stopping power ~ 1.5%-2% higher than G4_WATER for my carbon ion beam.

So then we should assume an uncertainty of the same order for stopping power of all hand-made materials?

In any case, changing the ionization potential of G4_WATER has the same effect as changing it in a hand-made material?

  Water = manager->FindOrBuildMaterial("G4_WATER");
  Water->GetIonisation()->SetMeanExcitationEnergy(XX.X*eV);

I am also having trouble with response to changes in ionization potential (http://hypernews.slac.stanford.edu/HyperNews/geant4/get/medical_app/215.html) and I am now wondering if it has something to do.

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1 Idea: Re: Water VS G4_WATER   (Vladimir Ivanchenko - 05 Feb, 2010)
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