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Forum: Hadronic Processes
Re: None Strange behaviors of the NeutronHPInelastic process using Lithium (Yuefeng Qiu)
Date: 16 Mar, 2014
From: michel maire <michel maire>

On Thu, 13 Feb 2014 20:31:14 GMT, Yuefeng Qiu wrote:
> I am currently testing the Geant4 code for fusion neutronic application,
> which is seldomly done before. I got very strange result for isotopes
> Li-6 and Li-7, which have very large differences with MCNP and FLUKA
> results.
> I use a very simple geometry, a sphere with R=30cm, assuming its volume
> is 1 cm3. And a use a point source at the center of the ball with
> initial energy 14.1 MeV. The material I used is one pure isotope. H-1,
> Li-6, Li-7, Be-9 and Cnat is tested, with density assuming 1.0 g/cm3.
> I made the flux score myself by accumulating the neutron track length
> inside the sphere, and divided into 260 energy bins. And the flux
> spectrum is obtained by Flux density / &#8710;E. In these calculations I
> used Geant4 10.0.0 and GNDL4.4.
>
 I tried to repeat your exercice. Plots in attachment. The comparison is not easy: not the same scale, not the same normalisation,..etc..
 But we can say that Li7 distribution seems compatible with yours, but not Li6.
 I attach also PhysicsList, and log files.

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/03/16/09.36-91969-Li7.gif
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/03/16/09.36-70868-Li6.gif
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/03/16/09.36-23182-PhysicsList.cc.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/03/16/09.36-35367-Li7.log.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/03/16/09.36-23526-Li6.log.txt

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