|Message: Re: Radioactive Decay of Be8||Not Logged In (login)|
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On Mon, 29 Apr 2013 20:35:48 GMT, Joel Long wrote: > In modeling a detector, two of the reactions I am looking for is: > > Be9 (n,2n) Be8 -> 2alpha Be9 (n,alpha) He6 > > I am using the HP neutron data, and have verified that the > cross-sections for both reactions are correct. > > The problem is that I am not seeing any Be8 produced, based on a check > in a user stepping action (even though it should be the dominant > inelastic product in the ~14 MeV range I am interested in), and I have > not been able to verify that the associated alphas are showing up > either. > > Can someone verify whether Be8 -> 2alpha is handled by the code in some > way I haven't found, and perhaps the best way to check that this > reaction is happening? All the useful SetVerbose() functions I have > found are fairly inaccessible without building a completely custom > physics list. > 1- I ran Hadr03, for neutronHP and binaryCascade, with macro below. Results in attachment.
# Macro file for "Hadr03.cc" # (can be run in batch, without graphic) # /testhadr/det/setIsotopeMat Be9 4 9 1.85 g/cm3 /testhadr/det/setSize 100 m # /run/initialize # /gun/particle neutron /gun/energy 14 MeV # /process/list /process/inactivate hadElastic # /run/beamOn 100000
2- It is true that alpha decay of Be8 is not handled by radioactive decay data. However you can write your own data file. Examples are shown both in rdecay01 and rdecay02.
Attachment: http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/04/30/04.57-71461-neutronHP.log.txt http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/04/30/04.57-75854-QBBC.log.txt