|Message: Co-60 source with Gaussian distribution||Not Logged In (login)|
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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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