|Message: Re: Questions about QBBC Physics List||Not Logged In (login)|
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On Fri, 12 Dec 2014 16:25:27 GMT, Zach Miller wrote:
> I think I have answered my own question for question 1. > > In order to match up with ENDF, I am having to multiply my (GEANT's) > answer by the (atomic mass)/100. So for 1-H, I multiply by 0.01. For > 16-O, 0.16. For 12-C, 0.12. I'm not sure why this factor is occurring in > my GEANT results. > Any guidance on why this is behaving so strangely?
The problem is here : G4BestUnit(dataStore->GetCrossSectionPerVolume(particle,en,process,material)/density,"Surface") crossSectionPerVolume/density is not a surface; it is a surface per mass (e.g. cm2/g)
So correct statement is : G4BestUnit(dataStore->GetCrossSectionPerVolume(particle,en,process,material)/density,"Surface/Mass")
You may have a look into G4UnitsTable in geant4/source/global/management
> guidance on my second question in my previous post as well, I've found > that the 12C inelastic cross-sections are also suffering from a similar > problem to what I describe (averaging over wide energy ranges to get > general behavior).
I let the question to QBBC experts
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