|Message: Re: Are production models included in LHEP_PRECO_HP?||Not Logged In (login)|
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On Tue, 2 Oct 2007, Victor_Makarov wrote: > *** Discussion title: Physics List > Email replies to PublicHyperNews@slac.stanford.edu must include: > In-Reply-To: <"/phys-list/408/1/1"@geant4-hn.slac.stanford.edu> > Subject: ...change this to be about your reply. > > Thank You for reply and help! One more question. I've read > G4ProtonIsotopeProduction.hh. It says: "Isotope production model for > proton induced production below 100 MeV". Are there any other models for > proton induced production of isotopes in Geant 4? 100 MeV - is it an > upper limit for measured experimental data or is it an energy above > which the isotope production is impossible? Thanks. > Hello Victor, I am not an expert in the field and I would like to clarify some moemnts: 1) we always recommend to use QGSP_BIC_HP Physics Lists for low-energy neutron aplications, not LHEP. 2) in QGSP_BIC_HP elastic or inelastic interactions Geant4 generate a recoil nucleaus with Z and A closed to the stability road. If Radioactive decay physics is acticvated additionally to any reference PhysLisst then this recoil nucleus can have radiactive decay on fly or at rest. 3) To have more correct distribution over final Z and A I would suggest to have G4Elements constructed from isotopes, for example, by using NIST elements and/or materials. 4) I do not know a model which produces secondary excited neuclei (experts tell us if this is wrong). Infrastructure of G4 allows but do we have any implementation? 5) A special method for isotope production to which you likely refer to my view is old and not well tested, I am not sure if somebody understand what it is doing (experts tell us if this is wrong). VI
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