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Forum: Physics List
Re: None Is it still valid when limiting electron step to micros? (Yigong Zhang)
Re: Idea Re: Is it still valid when limiting electron step to micros? (Vladimir Ivanchenko)
Re: None Re: Is it still valid when limiting electron step to micros? (Yigong Zhang)
Re: Idea Re: Is it still valid when limiting electron step to micros? (Vladimir Ivanchenko)
Re: None Re: Is it still valid when limiting electron step to micros? (Yigong Zhang)
Date: 19 Sep, 2017
From: michel maire <michel maire>

On Mon, 18 Sep 2017 19:02:22 GMT, Yigong Zhang wrote:
> I don't know how to check. They are random walks. Check electron spatial
> and energy distributions at certain distance away from the source?
> 
> - Y
> 

  I ran example TestEm1 with the attached macro.
  The histogram shows total track length of the primary e- with 3 step size : 10 um, 1 um, 0.1 um.

 An additional comment : G4 penelope physics list do not use the original penelope multiple scattering, but the default Urban model, as G4 standard and livermore physics lists.
 Since multiple scattering is the dominant mechanism for e- at 1MeV (see pdf Screen Shot), the 3 families of Em processes must be more on less equivalent.

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2017/09/19/05.49-41965-yigong.mac.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2017/09/19/05.49-6248-stepmax.gif
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2017/09/19/05.49-81360-017-09-19_at_12.03.51.pdf

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1 None: Re: Is it still valid when limiting electron step to micros?   (michel maire - 20 Sep, 2017)
(_ None: Re: Is it still valid when limiting electron step to micros?   (Yigong Zhang - 03 Oct, 2017)
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