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Forum: Processes Involving Optical Photons
Re: Question Problems with Optical Photons [OpAbsorption] (Ana)
Date: 11 Mar, 2011
From: Gumplinger Peter <Gumplinger Peter>

Hi Ana,

> I reated the simulation with a previous version of geant.

Are you telling me that your simulation worked with G4 version 9.3?

I am assuming that you have provided the G4OpAbsorption length for LSO in the range of optical photons you generate with G4Scintillation.

There is some memory corruption. This is indicated by:

InteractionLength= 1.79769e+307[cm]

and

currentInteractionLength = -nan [cm]

I think I just spotted the error:

      pmanager->AddContinuousProcess(theRayleighScatteringProcess);
      pmanager->AddContinuousProcess(theBoundaryProcess);

This should read:

  pManager->AddDiscreteProcess(theRayleighScatteringProcess);
  pManager->AddDiscreteProcess(theBoundaryProcess);

But the former was never correct!

There may be other problems though...I hope it's not a bad interplay between the new 'Low Energy' and optical processes. I have not tested this.

Peter

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1 None: Re: Problems with Optical Photons [OpAbsorption]   (Ana - 14 Mar, 2011)
1 Feedback: Re: Problems with Optical Photons [OpAbsorption]   (Gumplinger Peter - 15 Mar, 2011)
2 Warning: Re: Problems with Optical Photons [OpAbsorption]   (Gumplinger Peter - 15 Mar, 2011)
1 Sad: Re: Problems with Optical Photons [OpAbsorption]   (Ana - 22 Mar, 2011)
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