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Re: Question Cf 252 Neutron Source (Eric)
Date: 23 Jul, 2011
From: Zach Hartwig <Zach Hartwig>

Hi Eric,

Unless you are explicitly studying the physics and all daughter particles of Cf-252 decay (in which case the use of G4RadioactiveDecay as Michael suggests would be appropriate), I would suggest that you use the G4GeneralParticleSource module provided with Geant4. This module provides for the construction of a wide variety of particle sources, including very complex ones. See the user manual at: http://reat.space.qinetiq.com/gps/new_gps_sum_files/gps_sum.htm

Without knowing your specific requirements, my guess is that you require a point Cf-252 spontaneous neutron fission source (isotropic angle, correct fission energy spectrum). I have attached a macro file that models exactly this neutron source (note that G4GeneralParticleSource is controlled via runtime commands so you'll need to execute this macro from within your simulation, e.g.:

  /control/execute Cf252NeutronVertex.txt

As always, the usual warnings apply. Please verify that the attached macro file produces the neutron spectrum that you require.

Hope this helps.

~ZSH

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/07/23/06.54-36663-Cf252NeutronVertex.txt

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1 None: Re: Cf 252 Neutron Source   (Luis Manzanillas - 28 Oct, 2014)
2 More: Re: Cf 252 Neutron Source   (Shivang Tripathi - 13 May, 2015)
1 Idea: Re: Cf 252 Neutron Source   (Zach Hartwig - 13 May, 2015)
1 None: Re: Cf 252 Neutron Source   (Shivang Tripathi - 13 May, 2015)
2 Idea: Re: Cf 252 Neutron Source   (Zach Hartwig - 14 May, 2015)
1 Ok: Re: Cf 252 Neutron Source   (Shivang Tripathi - 14 May, 2015)
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