Message: Re: Cross sections of the reaction Al(p,x)26Al and Si(n,x)26Al calculated by Geant4 are different with experimental data. Not Logged In (login)
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Idea Re: Cross sections of the reaction Al(p,x)26Al and Si(n,x)26Al calculated by Geant4 are different with experimental data. 

Forum: Hadronic Processes
Re: None Cross sections of the reaction Al(p,x)26Al and Si(n,x)26Al calculated by Geant4 are different with experimental data. (liyong)
Re: None Re: Cross sections of the reaction Al(p,x)26Al and Si(n,x)26Al calculated by Geant4 are different with experimental data. (Daren Sawkey)
Re: None Re: Cross sections of the reaction Al(p,x)26Al and Si(n,x)26Al calculated by Geant4 are different with experimental data. (Jose Manuel Quesada)
Date: 23 Aug, 2015
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

Hello,

I would add that at these energies there may be part of reactions where cascade model is responsible. In particular p+Al27 -> p + n + Al26. This reaction channel is practically quasi-elastic and the Al26 fragment is nearly at rest. Another mechanism - excited fragment emitting p and n, where fragment may have some recoil. To compare with the data it would be good to see how data are measured and which reaction channel is reproduced in Geant4 simulation. For that neutron and recoil spectra should be studied. Counting only final recoil numbers may shadow the situation.

Also one should be sure that there is no contribution from the elastic channel which may be responsible for the recoil (even if the contamination of Al26 is nearly zero).

VI

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