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Question Simulation of an AmBe-neutron source 

Forum: Hadronic Processes
Date: 20 May, 2016
From: Martin Kirchner <Martin Kirchner>

Hello G4Experts!

I'm trying to simulate the neutron energy spectrum of an Am-Be neutron source, so basically the reaction 9Be(alpha,n)12C.


I defined a (64mm) Cube of 9Be, use /gps in my .mac to place 241Am inside the cube and let it decay. I will attach the PhysicsList.cc that is in use. This simulation is placed inside a bigger project, so some of the PhysicsList should not be relevant for this problem.


After ~80 million runs I get a neutron energy spectrum that does not show the characteristic peaks of the real source (pictures attached).


Any help to improve the simulation is greatly appreciated!
Thank you in advance,
Martin

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/05/20/08.17-76252-PhysicsList.cc
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/05/20/08.17-18632-AmBe_Sim_outofcube.jpg
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/05/20/08.17-75260-AmBeSpec_ISOrecomm.jpg

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1 None: Re: Simulation of an AmBe-neutron source   (Artem Zontikov - 21 May, 2016)
(_ More: Re: Simulation of an AmBe-neutron source   (Martin Kirchner - 23 May, 2016)
(_ None: Re: Simulation of an AmBe-neutron source   (Artem Zontikov - 25 May, 2016)
(_ None: Re: Simulation of an AmBe-neutron source   (Martin Kirchner - 14 Jun, 2016)
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