|Message: Re: Gaussian-like curve?||Not Logged In (login)|
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> *** Discussion title: Analysis > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/analysis/17/1/1"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Dear Sir, > > Having a very sharp peak would imply that the detector is very (if not, > almost 100% percent) good in its energy resolution. This may be true for > Germanium/Silicon detectors. But I am using a Sodium Iodide Detector > which has 8 to 10 % energy resolution. So in one way, I expect to obtain > a gaussin-like curve in the Histogram. > It is not true - if you take infinite CsI detector you will have near 100% resolution. If you take small Si detector - you will have bad resolution. For specific particles/energy one have to choose the size. > I supposed that one needs the area of the fitted gaussian-like curve in > order to calculate the FWHM and to obtain the energy resolution of the > constructed detector? (i.e., say a cylindrical Sodium Iodide Detector) > > What about the energy fluctuation during the detection? How does one > simulate this fluctuation so that he can obtain a gaussian like curve? > Default G4 simulation has all types of fluctuations. The results can seen in examples - Em2, Em3... VI
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