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Forum: Hadronic Processes
Re: None Inelastic gamma emission from carbon (Michael)
Re: None Re: Inelastic gamma emission from carbon (michel maire)
Date: 18 Jan, 2018
From: Michael <Michael>

On Thu, 18 Jan 2018 14:47:39 GMT, michel maire wrote:
> On Wed, 10 Jan 2018 18:17:04 GMT, Michael wrote:
> 
> > Hi,
> > 
> > I'm looking at n,n'g on carbon (14.1 MeV neutrons) and the production
> > intensity of the 4.4 MeV line is correct when material is 100 % carbon;
> > however when the material is a mixture the intensity does not scale by
> > the number density of carbon in the mixture i.e.
> > 
> > G4Material* PlasticMat = new G4Material("PlasticMat",1.00*g/cm3, 2);
> > PlasticMat->AddElement(Hydrogen, 1); PlasticMat->AddElement(Carbon, 1);
> > 
> > This material should produce 50 % gamma emission compared to:
> > 
> > G4Material* carbon = new G4Material("carbon",1.00*g/cm3, 1);
> > PlasticMat->AddElement(Carbon, 1);
> > 
> > I'm using the QGSP_BERT_HP physics package for this...
> > 
> 
>   I ran example Hadr03 for the 2 materials. I attach macro, output and plot.
> 
>    Attachment:
>       http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2018/01/18/06.44-6300-neutron.mac.txt
>       http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2018/01/18/06.44-33100-neutron.out.txt
>       http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2018/01/18/06.44-44387-gamma.gif
> 

Thanks for doing that for me. Do you see what I mean...the n,'g does not cut by half...?

Also, the emissions at 9.5 and 12 MeV shouldn't decay by gammas.

Mike.

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