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Forum: Hadronic Processes
Re: Question Neutron Range (M Sek)
Re: None Re: Neutron Range (michel maire)
Re: None Re: Neutron Range (M Sek)
Re: None Re: Neutron Range (michel maire)
Re: None Re: Neutron Range (M Sek)
Date: 16 Dec, 2017
From: michel maire <michel maire>

On Fri, 15 Dec 2017 16:32:33 GMT, M Sek wrote:

> Thank you so much for your consideration. I am grateful for your reply
> and teaching efforts. Using a proton in a Hadr example was just because
> of curiosity and I was trying to make it clear for me.
> On the other hand, I tried to run the macros you provide. As you already
> mentioned, visual observation makes it more clear for understanding yet
> I still aspire to obtain the neutron and gamma ranges in materials. It
> is clear that Bethe-Bloch formula is valid for charged particles. Also,
> you indicate range or penetration definitions are not so simple for
> neutral particles, I also get that. However, there must be a method for
> obtaining these values. I am sure Geant4 is capable of doing that. I
> just do not know how to use it. I will be so grateful if you could point
> a direction for me.

  In Geant4, we call gamma range : 5*totalInteractionLength (e.g. photoelec+compton+conversion)
  This is reasonable : proba = exp(-5), but somewhat arbitrary. I am not sure this definition is enough for neutron.
  Another approach is to consider the end of depth edep profile. Sush a plot can be done with TestEm11 for gamma (histo 1) or Hadr07 (histo 10) 

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