|Message: Re: Optical Reflectivity||Not Logged In (login)|
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The optical reflectivity of the scintillator surface is the probability of reflection (as opposed to absorption) at each and every bounce; i.e. encounter with the surface. The optical reflectivity is a material (surface) property which you need to know through other means.
Conversely, if you know the light yield, and for your geometry and PMT photo efficiency, the number of photo electrons at the PMT for 662keV gammas, you can tune the MC optical surface reflectivity until the MC gives you the same result.
Of course, with 100% reflectivity all produced photons (assuming you have no bulk absorption) will eventually arrive at your PMT no matter how many bounces.
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