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Forum: Physics List
Re: Question range-cut (lalageh)
Date: 29 Nov, 2015
From: Michael H. Kelsey <Michael H. Kelsey>

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.

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1 None: Re: range-cut   (michel maire - 30 Nov, 2015)
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