Message: Re: range-cut Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: range-cut 

Forum: Physics List
Re: Question range-cut (lalageh)
Re: None Re: range-cut (Michael H. Kelsey)
Date: 30 Nov, 2015
From: michel maire <michel maire>

On Mon, 30 Nov 2015 03:27:11 GMT, Michael H. Kelsey wrote:
> On Sun, 29 Nov 2015 05:14:53 GMT, lalageh wrote:
> 
> > I have a question regarding the range cuts in Geant4. Range-cuts in
> > Geant4 are defined as threshold below which no secondary particle will
> > be generated. I would like to know how photons are treated since they
> > have no range, is it the same mean free path in photon case?
> 
> Photons do have an effective "range," referred to as the "radiation
> length" when passing through material. It is e-folding distance for
> attenuation of a beam. You're quite right that some photons will travel
> many many radiation lengths.
> 

 For photons, "range" is defined as 5 Mean Free Path.
 Mean Free Path refers to total cross section : photoEffect + Compton + pair creation

 Add Message Add Message
to: "Re: range-cut"

 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 ]