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I use the optical photons processes and I ran into something that, I think, could be improve. Actually, in a dielectric_metal surface, incorrect behavior happens if one gives the reflectivity or the efficiency of a surface through AddConstProperty instead of AddProperty. Maybe I missed something in the documentation, but it seems natural to use AddConstProperty if one wants the property to be independant of wavelength. As an example, change the line
in the extended/optical/LXe/src/LXeMainVolume.cc and see the results.
Otherwise, it seems like a considerable effort was made by François-Xavier Gentit to model optical photons http://gentit.home.cern.ch/gentit/litrani/
I wonder if GEANT4 could benefit from some parts of this work.
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