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None Co-60 source with Gaussian distribution 

Forum: Particles
Date: 08 Jul, 2011
From: Athreya Shankar <Athreya Shankar>

hello,

I am trying to simulate the response of an NaI scintillator to a Co-60 source.

First,I used the command /gps/particle/ion 27 60 0 0 (A) and tried the simulation,ie I let Geant take care of the decay process. I got a spectrum that was too good to be true- very little compton scattering, and very sharp peaks.

2. Next, I placed two gamma sources(B), one shooting the 1.17 MeV and the other the 1.33 MeV, but with a Gaussian distribution, and setting multiplevertex to true. that is, I tried to manually construct a Co-60 source, that could also involve factors taking into account the detector resolution(the reason for the Gaussian distribution). I got a more realistic spectrum.

My question is : is there a way by which we can use the /gps/particle/ion option and construct a Co-60 source, but at the same time tell geant that we want a certain resolution for our spectrum?

further, I would also like to know how reliable the method A, where geant takes care completely of the decay process, is.

I attach here the two spectra obtained using method A and method B.

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/07/08/03.27-36396-_directly_as_a_source.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2011/07/08/03.27-26278-two_gamma_sources.png

thanks in advance, Athreya

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1 None: Re: Co-60 source with Gaussian distribution   (Davinder Siwal - 08 Jul, 2011)
1 Question: Re: Co-60 source with Gaussian distribution   (Athreya Shankar - 08 Jul, 2011)
(_ None: Re: Co-60 source with Gaussian distribution   (Davinder Siwal - 08 Jul, 2011)
2 Question: Re: Co-60 source with Gaussian distribution   (HuangHong - 11 Aug, 2015)
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