|Message: Re: PhotoNuclear Cross sections don't seem to be correct.||Not Logged In (login)|
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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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