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Question Optical properties of epoxy? 

Forum: Processes Involving Optical Photons
Date: 18 Dec, 2009
From: Astrid Velroyen <Astrid Velroyen>

Hello geant4 community,

I would like to change a code to a certain geometry and materials. In this code there is a window defined between a scintillation crystal and a photon counting detector. This window is defined as made of quartz with the optical properties as follows:
  G4MaterialPropertiesTable* myQuartzWindow = new G4MaterialPropertiesTable();

  G4double quartzPhotonAbsorptionLengthNRG[num] = {1239.85*eV*nm/280./nm ,
						   1239.85*eV*nm/880./nm};
  G4double quartzPhotonAbsorptionLength[num] = {5000.*mm , 5000.*mm};
  myQuartzWindow->AddProperty("ABSLENGTH",quartzPhotonAbsorptionLengthNRG,
			      quartzPhotonAbsorptionLength,num);

  G4double quartzPhotonRefractiveIndexNRG[num] = {1239.85*eV*nm/280./nm ,
						  1239.85*eV*nm/880./nm};
  G4double quartzPhotonRefractiveIndex[num] = {1.458 , 1.458};
  myQuartzWindow->AddProperty("RINDEX",quartzPhotonRefractiveIndexNRG,
			      quartzPhotonRefractiveIndex,num);

  windowQuartz->SetMaterialPropertiesTable(myQuartzWindow);

In our geometry, we have a window made of epoxy. I would like to know if anybody has already designed something with epoxy or knows a paper/database/something else where I can find these optical properties for epoxy (which consists of 95% Bisphenol A).

Sincerely,

Astrid Velroyen

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