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Forum: Hadronic Processes
Re: Question PhotoNuclear Cross sections don't seem to be correct.
Re: More Re: PhotoNuclear Cross sections don't seem to be correct.
Date: 24 Nov, 2012
From: michel maire <michel maire>

On Fri, 23 Nov 2012 11:57:43 GMT, emc2 wrote:
> <** update **> I have used QGSP_BERT physics list instead of my
> customised one. That did not make any difference at all.
> 
> I have generated 27MeV gammas and all i can see is the 3-body break up
> channel where i am supposed to see (two 2-body breakup channels plus the
> 3-body break up channel).
> 
> the cross section for the 3 body break up is still far below the two
> body break up threshold.
> 
> i would really appreciate any comments on this urgently.
> 

 Hadr03 is a new example made to identify nuclear reaction channels. It will be available with geant4.9.6 release.
 I shoot gamma, 27 and 28 MeV on Helium4. In attachement, the relevant part of the outputs. At 27 Mev, there are only 2-boby channels. The 3-boby channel appears at 28 MeV, but together with 2-boby channels.
 I am not an expert of hadronic physics, and I do not know if ratio of various channels are correct or not.

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2012/11/24/12.31-60516-27MeV.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2012/11/24/12.31-83348-28MeV.txt

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1 Question: Re: PhotoNuclear Cross sections don't seem to be correct.   (emc2 - 24 Nov, 2012)
1 More: Re: PhotoNuclear Cross sections don't seem to be correct.   (emc2 - 25 Nov, 2012)
(_ None: Re: PhotoNuclear Cross sections don't seem to be correct.   (Michael H. Kelsey - 26 Nov, 2012)
2 More: Re: PhotoNuclear Cross sections don't seem to be correct.   (emc2 - 25 Nov, 2012)
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