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Forum: Processes Involving Optical Photons
Re: Question Cerenkov Process Problem 1
Date: 14 Oct, 2015
From: Gumplinger Peter <Gumplinger Peter>

On Sat, 10 Oct 2015 09:58:26 GMT, Sage wrote: Dear Sage,

> I modify the N06 example in geant4.9.4.p02 novice examples, and find
> that without both Ionization and Bremsstrahlung processes, there would
> be no generation of Cerenkov photons.
> Could anyone tell me the reason?

G4Cerenkov needs to know the range at which the particle goes below the Cerenkov threshold in order to calculate a step size that is limited by that threshold and no Cerenkov photons are generated beyond it. For this reason you need Ionization.

        G4double Range    = G4LossTableManager::Instance()->

I'll look into changing G4Cerenkov so it works even when there is no Ionization process attached to the particle.


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