Message: Re: Gaussian-like curve? Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Re: Gaussian-like curve? 

Forum: Analysis
Re: Question Gaussian-like curve?
Re: None Re: Gaussian-like curve? (Vladimir Ivanchenko)
Re: None Re: Gaussian-like curve?
Date: 23 Sep, 2002
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

> *** 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

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

 Add Message Add Message
to: "Re: Gaussian-like curve?"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]