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Keywords: downscaling optical photons
Forum: Processes Involving Optical Photons
Date: 18 Nov, 2002
From: Gumplinger Peter <Gumplinger Peter>

Hi Jacek,

Yes, you can cheat by reducing the scintillation yield but there is no equivalent user driven variable for the Cerenkov process.

Now, if you have access to the G4 source, you can clobber the return of the method 'GetAverageNumberOfPhotons' in method AlongStepDoIt of

What most people would really like to do, in the absence of any process which changes the wavelenght of the optical photon, is to apply the photo detector efficiency of their device when the wavelength of the photon is calculated in G4Scintillation and/or G4Cerenkov. Conceptually, this mixes the production of photons with the response of the detector. For this reason, code which would allow this has not been implemented at this stage of GEANT4.

Your request strengthens the argument that it should probably be allowed in a future release. It's a bit late now for the next release, but I shall bring it up in discussions with the G4 Technical Steering Board.

Regards, Peter

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