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Idea Re: Giant Dipole Resonance photo-neutron production in medical linac 

Forum: Hadronic Processes
Re: Question Giant Dipole Resonance photo-neutron production in medical linac (Alessandro Berra)
Re: None Re: Giant Dipole Resonance photo-neutron production in medical linac (Dennis H. Wright)
Re: None Re: Giant Dipole Resonance photo-neutron production in medical linac (Alessandro Berra)
Re: None Re: Giant Dipole Resonance photo-neutron production in medical linac (michel maire)
Date: 26 May, 2013
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

Hello,

Be careful: if you deactivate any process you will have wrong physics and results will not be reliable. You need to run with high statistics or apply biasing methods. To understand the level of the problem you may use 

$G4INSTALL/examples/extended/electromagnetic/TestEm0 

to study EM cross sections and

$G4INSTALL/examples/extended/hadronic/Hadr00 

to study gamma-nuclear cross section. 

The simplest biasing method is to multiply small cross section by a factor, which increase the probability of events of interest but does not change significantly overall tracking. If rare process cross section will be enhanced too much one need apply extra which is out of scope of initial discussion.

VI

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1 None: Re: Giant Dipole Resonance photo-neutron production in medical linac   (Alessandro Berra - 27 May, 2013)
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