|Message: Re: Optical Surfaces and Sigma_Alpha||Not Logged In (login)|
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Just my two cents:
I nearly always implement a physical gap between scintillators and wrappings and do not use the BACKPAINTED option (unless I'm dealing with liquid scintillators, which do not have gaps).
I do this because one will nearly always have gaps between scintillators and wrappings unless one decides to put some optical grease between them. In this case, I allow myself the option to put the grease in.
More importantly, I've found that for large scintillators (and *especially* long, thin bar geometries) the size of the gap plays a large role in the number of photons one collects due to total internal reflection.
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