|Message: Re: Low energy hadronic Cross Section for 11^C Production||Not Logged In (login)|
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On Fri, 26 Sep 2014 09:43:06 GMT, Andrea wrote:
> Hi, we are simulating with Geant4 10.0.02 a chamber containing > high-pressure nitrogen, on which we direct a point-like beam of protons > with energy of 15.3 MeV (this is just a preliminary test). Using the > "PreCompound" model for hadronic physics and setting each time one of > the several preset dataSet for the cross sections, we cannot achieve the > desired result (comparing with IAEA data) for the production of 11^C ( > p+14^N->11^C+alpha). We used also other models model (such as > BinaryCascade, Bertini, INCLXX), but using the "PreCompound� and the > G4ChipsProtonInelasticXS (we tried also G4BGGNucleonInelasticXS, > G4CrossSectionInelastic, G4ProtonInelasticCrossSection, > G4IonProtonCrossSection and G4HadronInelasticDataSet) we obtained the > best results. Is there anyone who has ever tried to do something > similar? What can we do? Is there a relatively simple way to set the > cross section for this reaction channel without going to change all the > physics? It accepts any advice, thank you all.
First a small comment: are you just looking at the inclusive (p,a) cross section or do you have a handle on the energy-differential cross section, for instance? I am asking because the inclusive cross section at one fixed energy cannot possibly be enough to determine which cross section/model combination works best.
I believe there is no standard way of enforcing a particular cross section. You should probably write your own proton-inelastic process if you want to do that.
Hope that helps, Davide
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