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Forum: Physics List
Re: Question Using G4EmPenelopePhysics.cc (Tanjil)
Date: 29 Oct, 2015
From: Tanjil <Tanjil>

On Thu, 29 Oct 2015 09:20:45 GMT, John Allison wrote:
> This is a compilation error in your main program, perhaps a missing
> semi-colon, or something.
> 
> But anyway, a builder is not a physics list. Why don't you use a
> Reference Physics List or even the Physics List Factory as described in
> the Application Developers Guide, Section 6.1.2. Physics Lists.
> 

Dear John,

Thank you for your reply. Lets start over. Originally I started with the physics list in attachment 1. The results obtained from this produced a build up of dose at the tail end of my bragg peak compared to FLUKA as shown in attachment 2.

   Attachment1:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/10/29/12.46-32696-PhysicsList.cc

   Attachment2:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/10/29/12.46-44646-bragg_peak_original.png

For a spread out bragg peak, this extra dose accumulates and becomes quite significantly discrepant from FLUKA and deforms my SOBP completely. Therefore, I am now attempting to reduce/understand the extra entrance dose.

I have used QGSP_BERT_HP and QGSP_BIC_HP, they are supposed to be more suited for lower energies/medical applications but results from those have been worse than Attachment2, as shown in Attachment 3.

   Attachment3:
       http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/10/29/12.46-67947-agg_peak_QGSP_BERT_HP.png

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1 Idea: Re: Using G4EmPenelopePhysics.cc   (Vladimir Ivanchenko - 06 Mar, 2016)
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