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Question Thermal neutron and QGSP_BERT_HP physicList 

Forum: Hadronic Processes
Date: 03 Apr, 2015
From: Simon Nicolas <Simon Nicolas>


I have a simple source of thermal neutrons and I want to compare the (n, alpha) reaction rate and neutron flux in the boron thickness with MCNP.

My geometry is an aluminum cylinder (internal radius = 36 mm, external radius = 38.25 mm and length = 702.5 mm) which contains three other smaller cylinders (internal radius = 11.5 mm, external radius = 12.7 mm and length = 566 mm). The three smaller cylinders have a thin thickness of boron (1.26 um).

To calculate the reaction rate in the boron with G4, I use this simple definition: Reaction rate = number of (n, alpha) / number of particles simulated. With MCNP I found the same result of reaction rate. But the result of the flux in one boron cylinder is different.

Maybe the problem is with my PhysicList, I only use QGSP_BERT_HP physicList. Should I create my physicList for thermal neutrons ? Do you have a physicList example for thermal neutrons ?

Best regards,


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1 None: Re: Thermal neutron and QGSP_BERT_HP physicList   (Dennis H. Wright - 14 Apr, 2015)
2 Question: Re: Thermal neutron and QGSP_BERT_HP physicList   (Amjid Mahmood - 30 Jul, 2015)
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