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Forum: Documentation and Examples
Re: None rdecay02 vs gamma source (Alessia)
Date: 24 Aug, 2016
From: Laurent Desorgher <Laurent Desorgher>

Dear Alessia,

The Germanium detector in the rdecay02 example has a huge lateral dimension (it covers the world dimension). It makes that for a lot of decays the CO60 gammas are detected in coincidence. That exaplines why you see a huge peak at the sum of the two characteristic peaks of C060 decay. That is also why the gamma peaks are much more predominant that the typical compton signature. Again the dimension of the detector is so huge that it is close to a total absorber. Which kind of detector do you use in your own simulation? Probably not the same as in the Rdecay02 example.

Best regards

Laurent

On Thu, 21 Jul 2016 11:55:55 GMT, Alessia wrote:

> Dear all,
> 
> I am trying to simulate a radiation source, i.e. Co60. First of all, I
> simulated two different gammas with a random Gaussian (gamma.png). After
> that I tried to compare this spectrum with the spectrum creates with
> rdecay02 (rdecay02.png). I can see the two gammas peak but I miss all
> the other part, and I have something after the peaks. I do not
> understand where is the problem. Is it possible to obtain the same
> spectrum? Many thanks for every suggestion. Best regards Alessia
> 
>    Attachment:
>       http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/07/21/03.44-31254-gamma.png
>       http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/07/21/04.54-19005-rdecay02.png
> 

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