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Question NaI scintillator 

Forum: Geometry
Date: 06 Apr, 2011
From: Simone <Simone>

hello,

I'm trying to define a NaI scintillator, surrounded by 4 Al surfaces and with 2 exit windows that connect it to a photomultiplier by SiO2 light guides

not having had any experience with scintillators I decided as a first step to define only housing and NaI cristal, and to make the SiO2 guides sensitive detectors on the windowed sides to directly count optical photons coming out.

I based my detectorconstruction on EXN06, but I'm having a problem with scoring and several doubts

- i corrected the values for RefractiveIndex (and soon I will do the same for Absorption1[nEntries]) adapting from water to NaI, but what is the physical meaning of ScintilSlow and ScintilFast? are they still important if you don't mind time in your simulation?

- from what i understood there is no need to actually wrap the scintillator in Al as long as i specify a dielectric-metal surface between NaI and ExpHall, is it correct? (I needed to cover the upper side anyway in order to simulate absorption of incoming photons)

- my sensitivedetector is not recording anything, even though i can see in visualization opticalphotons passing through it

I have attached my Detectorconstruction, if there is any error/improvement to make please let me know

simone

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/04/06/03.29-13210-06DetectorConstruction.cc

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1 None: Re: NaI scintillator   (Audrey - 06 Apr, 2011)
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