|Message: Re: Strange behaviors of the NeutronHPInelastic process using Lithium||Not Logged In (login)|
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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 / ∆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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