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Question Gamma production from fast neutron scattering 

Forum: Hadronic Processes
Date: 11 Jun, 2010
From: Eric Lunderberg <Eric Lunderberg>

I am attempting to simulate a plastic neutron detector in the range of 50-100 MeV neutrons. I am using geant4.8.2 with the physics list "QGSP_BIC_HP".

When I run the simulation, there is a large disagreement between collected data and the simulated values of the detector. The simulation shows high-energy gammas producing excited electrons that are far too easy to detect. These gammas were released during the interaction of a neutron with 12C. A neutron hits a 12C nucleus, creating a 11B nucleus, a proton, a neutron, and three gammas.

I did a brief search of the forums to see if there was a solution to this problem. I found the post #1045 ( http://hypernews.slac.stanford.edu/HyperNews/geant4/get/hadronprocess/1045.html ) which describes what seems to be a similar issue wherein a neutron interacting with 6Li produces too many gammas. Would this issue be the same as mine, and, if so, could my issue be fixed by a modification of the patch attached to post #1045?

If there is any other information necessary to diagnose this problem, I would be happy to find it.

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1 Idea: Re: Gamma production from fast neutron scattering   (Vladimir Ivanchenko - 01 Jul, 2010)
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