|Message: Re: Water as Scintillator||Not Logged In (login)|
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I will try to answer your questions:
> > 1) What is Yield Ratio (Mentioned in DetectorConstruction.c under > material properties of water)? 2) How to get the Resolution Scale > (Mentioned in DetectorConstruction.c under material properties of water) > for e.g. NaI? 3) Fast time constant.? 4) Slow time constant.?
1) Yield Ratio - it's the ratio between the number of photons in fast/slow components of scintillation decay. (Look 3 and 4 for more details)
2) Basically, it's modified intrinsic energy resolution of scintillators.
Rscale=sqrt(E*ScintYield)*R/2.35, where R is the energy resolution (FWHM - Full width at half maximum ) at energy E.
3 and 4) Scintillators usually are characterized by 2 time components: one fast (or prompt), the other slow (or delayed). Thus, the time evolution of the number of emitted scintillation photons N in a single scintillation event can often be described by a linear superposition of one or two exponential decays. For two decays: N=A*exp(t/Tf)+B*exp(t/Ts)
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