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Idea Re: Physics of ion-interaction models??? 

Forum: Hadronic Processes
Re: Question Physics of ion-interaction models??? (Summit)
Re: Question Re: Physics of ion-interaction models??? (Summit)
Date: 08 Jan, 2014
From: Vladimir Ivanchenko <Vladimir Ivanchenko>


I do not pretend for complete answer but only practical comments:

1) In the simulation work, mostly we used more than one data set, such as: G4TripathiCrossSection, G4IonsShenCrossSection, G4IonKoxCrossSection, G4hadronInelasticDataSet and G4IonsSihverCrossSection in the same physics list, then in general on which cross section (dataset (s)), output of simulation will depend? And are these cross section (dataset (s)) capable to calculate partial fragmentation cross sections? and are these cross sections play role in computing dose-distribution by fragments of incident beam?

    We have studied these cross sections and come to conclusion that these cross sections do not provide best agreement with available data, so for the new release 10.0 we include the Glauber-Gribov cross section as the default for ion-ion interactions.

2) In simulation, I have used BIC, AA and QMD models with multifragmentation models. The output of the simulation is significantly different using various models. I want to know what are the main differences in the physics of the models and how multifragmentation affects the output of the simulation?

         AA model seems to be obsolete. MF improves some distributions, however, this model requires refinments before it would be included by default. We are not yet able to improve CPU performance of this model and this model violetes 4-momentum balance. 


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