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Question how to define optical surface properties of interface between non-metal and metal? 作者: Yan 

Forum: Geometry
Date: 14 Feb, 2006
From: dingdang <xiongsl@ihep.ac.cn>

I defined a plastic scintillator with a surface like this:
  G4OpticalSurface* OpScintSurface =     new G4OpticalSurface("ScintSurface",glisur,polished,dielectric_dielectric); 
  new G4LogicalSkinSurface("scint_surf",scin_log,OpScintSurface);

and a pmt with Al cathode like this:
  G4double photocath_EFF[num]={0.26,0.27,0.27,0.28,0.28,0.29,0.29,0.30,0.30,0.30,0.29,0.28,0.28,0.27,0.27,0.26,0.26,0.25,0.25,0.24,0.23,0.22,0.22,0.21,0.21,0.20,0.20,0.19,0.18};
  G4double photocath_REFL[num]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  G4MaterialPropertiesTable* photocath_mt = new G4MaterialPropertiesTable();
  photocath_mt->AddProperty("EFFICIENCY",Ephoton,photocath_EFF,num);
  photocath_mt->AddProperty("REFLECTIVITY",Ephoton,photocath_REFL,num);
  G4OpticalSurface* photocath_opsurf=
    new G4OpticalSurface("photocath_opsurf",glisur,polished,dielectric_metal);
  photocath_opsurf->SetMaterialPropertiesTable(photocath_mt);
  new G4LogicalSkinSurface("photocath_surf",cath_log,photocath_opsurf);

There should exist a thin non-metal interface whick is contacted with the non-metal plastic scintillator at one side and the pmt at the other side. How should I define the optical surface properties for this part?

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