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Forum: Analysis
Re: Question What is the default units of the total energy deposit in Geant4 (Scarlett)
Re: None Re: What is the default units of the total energy deposit in Geant4 (Michael H. Kelsey)
Date: 21 May, 2013
From: Scarlett <Scarlett>

On Tue, 21 May 2013 19:25:01 GMT, Michael H. Kelsey wrote:
> On Tue, 21 May 2013 04:37:18 GMT, Scarlett wrote:
>
> > I know the default units of energy and length are MeV and
> > mm,respectively, but what is the default units of the total energy
> > deposition in Geant4? If I count the total energy deposition value every
> > 0.01mm, what is the units of it?Thanks for you time to see this.
>
> The energy deposition is in energy units (so divide by MeV, GeV, or
> whatever your preference is when you print out values). Since the energy
> deposition is recorded per step, to get dE/dx you need to divide the
> energy deposit by the step length in your SteppingAction.
>
> -- Michael Kelsey
>

Tkanks for you very much!
Can I ask you another question? That is why the energy straggling data I get from Geant4 useing EM physics can't agreement with the data of theoretical calculation using Bohrís theory? Besides,the energy of incident particles range from 80MeV/u to 360MeV/u! Thanks again.

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