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Question neutron events with gcalor and geant3 

Forum: Hadronic Processes
Date: 25 Jan, 2010
From: David Barton <David Barton>

Hi, sorry to ask a geant3 question here but I need the help. I'm using the gcalor package to handle neutron events in my detector and I'm getting some strange results. My situation is I'm using 0.8 MeV neutrons and am looking at the position of the interaction and the energy transfer to the detector. I'm expecting mainly inelastic collisions with nuclei; however, I'm getting results in which I'm getting as much as 90% decrease in the kinetic energy of the neutron. It really doesn't seem to make much sense because I still get a neutron out, and according the the program I'm not generating any other particles. Assuming an elastic collision I should be getting no more that ~25 keV energy transfer to my detector atoms. Interestingly if I switch to using FLUKA my results make much more sense. The energies come out right, and while there are a few high-energy loss events, these events show secondary particle generation and I get photons or alphas out so they are clearly inelastic collisions. I'm using energy cuts of 1keV for hadrons and neutral particles so that shouldn't be a problem.

When I read the Gcalor documentation it seems like it should be the right package to use for these neutron interactions, but it doesn't seem to be working for me. One thing I wanted to check was to look at which interaction (elastic or what type of inelastic collision) was being generated for these events but I couldn't find a way to check that.

I can't figure out what I'm doing wrong with Gcalor, is using the FLUKA routines reasonable? Or if anyone has any ideas about working with Gcalor that would be great.

Any advice or suggestions would be helpful.

Thanks,

David

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1 None: Re: neutron events with gcalor and geant3   (Dennis H. Wright - 24 Feb, 2010)
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