|Message: Boundary interaction model||Not Logged In (login)|
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I have been trying to assess the characteristics of boundary interaction in Geant4 using the condition "frontpainted" (both polished and ground) for the dielectric_dielectric interface. I specified the imaginary and real refractive index of the surface and used a random polarization for a gps with simple optical photons. As far as I have understood Geant4 uses Maxwell equations to extract the reflectivity from the complex index of refraction and the component of the incident field. (from http://geant4.web.cern.ch/geant4/UserDocumentation/UsersGuides/ForApplicationDeveloper/fo/AllResources/TrackingAndPhysics/physicsProcessOptical.src/GetReflectivity.pdf)
Now,this does not take into account the refractive index of the volume from which the particle comes. This is not quite clear to me, since I would expect something like the Fresnel equation with the refracted ray absorbed. Could you explain the model implemented and where I'm wrong?
Thank you Nicolas
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