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Question Issues with "Shielding" in combination with importance sampling 

Forum: Physics List
Date: 16 Jan, 2017
From: Raphael <Raphael>

Dear all,

I am using Geant4 10.3 for neutron shielding calculations. In this connection I encountered an issue when using "Shielding" as my physics list combined with the importance sampling technique. In contrast to other physics list such as "QGSP_BERT_HP" or "QGSP_BIC_HP" I found a huge excess of gamma radiation in the MeV region. A closer inspection revealed that these gammas originate from radioactive decays. I also saw that the extra gammas all have a weight of 1 whereas other particles (mainly neutrons and gammas from other sources) have weights in the order of 10^-4 at this position. Is it possible that the radioactive decay ignores the weight of the neutron which activated the atomic nucleus?

Thank you, Raphael

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1 Idea: Re: Issues with   (Vladimir Ivanchenko - 04 Feb, 2017)
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