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Re: Question Problems with refractive of optical photons generating from NaI scintillation (jwdu)
Date: 13 Feb, 2006
From: Gumplinger Peter <Gumplinger Peter>

/----------------Dielectric metal surface properties defined via the G4OpticalSurface
   //NaI
   //  
   const  G4int num = 2;
    G4double Ephoton[num] = {2.034*eV, 4.140*eV};
   G4double Reflective[num] = {0.,0.};

Why do you set the reflectivity of your metal container to zero? That would mean that the metal is black and completaly non-reflective. Don't you want to opposite?

Now to your question. You don't have to attach a OpSurfaceSiO2 to your interface between NaI and SiO2. If you specify nothing you'll get refraction between NaI and SiO2 according to their respective index of refraction on a perfectly polished interface between the scintillator and the light guide. The default behaviour is explained in the documentation on careful reading.

Please, also see the extended optical example:

examples/extended/optical/LXe

You should specify 'Reflectivity' and 'Efficiency' only for dielectric metal surfaces.

(you can contact me through private email if you have more questions)

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