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Forum: Hadronic Processes
Re: Question Low energy hadronic Cross Section for 11^C Production (Andrea)
Date: 29 Sep, 2014
From: Davide Mancusi <Davide Mancusi>

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&#65533; 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.

Hi Andrea,

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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1 Question: Re: Low energy hadronic Cross Section for 11^C Production   (Andrea - 02 Oct, 2014)
(_ None: Re: Low energy hadronic Cross Section for 11^C Production   (Davide Mancusi - 02 Oct, 2014)
(_ Question: Re: Low energy hadronic Cross Section for 11^C Production   (Andrea - 04 Oct, 2014)
(_ Feedback: Re: Low energy hadronic Cross Section for 11^C Production   (Michael H. Kelsey - 04 Oct, 2014)
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