Message: RE: CoulombScat under 100 MeV Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None RE: CoulombScat under 100 MeV 

Forum: Physics List
Re: None CoulombScat under 100 MeV (Florian Zenoni)
Date: 11 Oct, 2013
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

Hello Florian,

Below 100 MeV multiple scattering is used, so it is not needed to extend Coulomb Scattering down to avoid double counting.


-----Original Message-----
From: Florian Zenoni [] 
Sent: Friday, October 11, 2013 3:17 PM
Subject: CoulombScat under 100 MeV

*** Discussion title: Physics List


I hope this topic hadn't already come out.
I'm using FTFP_BERT_HP Physics List to simulate neutrons interactions over a wide energy range (1.E-8 MeV -> 1.E3 MeV) and I'm experiencing differences with a paper which I take as a reference.
So, trying to investigating the causes, I find out that the difference comes from the region E <~ 10 MeV.

Looking at the beginning of the simulation, I see this:
CoulombScat: for e- SubType= 1
      Lambda table from 100 MeV to 10 TeV in 35 bins, spline: 1
      180 < Theta(degree) < 180; pLimit(GeV^1)= 0.139531
      ===== EM models for the G4Region DefaultRegionForTheWorld ======
  eCoulombScattering : Emin= 100 MeV Emax= 10 TeV

There is no eCoulombScattering when E < 100 MeV. Is it expected? Is there a way to lower it to 0 MeV? Would it be correct?

Thanks a lot,

Visit this GEANT4 at message (to reply or unsubscribe) at: 

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 None: Re: RE: CoulombScat under 100 MeV   (Florian Zenoni - 11 Oct, 2013)
 Add Message Add Message
to: "RE: CoulombScat under 100 MeV"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews

[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]