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None Neutron Physics in 9.3.p02 vs. 9.4.p01 

Forum: Hadronic Processes
Date: 06 Apr, 2011
From: Adam Anderson <Adam Anderson>

Some time ago, I created a very simple simulation to study an iron neutron shield for a DAR neutrino beam. I recently upgraded my geant4 installation from 9.3.p02 to 9.4.p01, and I noticed that given a fixed number of neutrons injected as primary particles, vastly more secondary neutrons are produced and eventually capture with 9.3.p02 than in 9.4.p01.

After reviewing the changelog between the two versions I still do not understand the source of the difference. As I am not truly an expert in geant4 development, I am curious whether there is someone who may have an idea of what is causing this issue. My best guess is that the problem originates from some change to the low-energy neutron physics models being used. For reference, I have attached my physics list.

Thanks for any guidance you can provide.

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      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/04/06/15.28-43927-PhysicsList.txt

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1 None: Re: Neutron Physics in 9.3.p02 vs. 9.4.p01   (Adam Anderson - 07 Apr, 2011)
2 Idea: Re: Neutron Physics in 9.3.p02 vs. 9.4.p01   (Vladimir Ivanchenko - 10 Apr, 2011)
1 More: Re: Neutron Physics in 9.3.p02 vs. 9.4.p01   (Adam Anderson - 10 Apr, 2011)
(_ Idea: Re: Neutron Physics in 9.3.p02 vs. 9.4.p01   (Vladimir Ivanchenko - 10 Apr, 2011)
(_ None: Re: Neutron Physics in 9.3.p02 vs. 9.4.p01   (Adam Anderson - 11 Apr, 2011)
(_ Ok: Re: Neutron Physics in 9.3.p02 vs. 9.4.p01   (Vladimir Ivanchenko - 11 Apr, 2011)
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