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Question Re: Ions simulations Physics List 

Forum: Physics List
Re: None Ions simulations Physics List (Stella Orfanelli)
Re: Idea Re: Ions simulations Physics List (Vladimir Ivanchenko)
Date: 05 Jan, 2011
From: Mark Looper <Mark Looper>

On Sat, 28 Aug 2010 16:36:27 GMT, Vladimir Ivanchenko wrote:

> Sorry to say but we do not have a good one. We can suggest QGSP_BIC,
> QGSP_BIC_HP, QBBC, QBBC_HP - in these Physics Lists there is the ion
> Binary cascade builder is included, which applicable for the cascade
> energy range.

Do I understand that you are referring to the G4BinaryLightIonReaction, as described at http://geant4.web.cern.ch/geant4/support/proc_mod_catalog/models/hadronic/G4BinaryLightIonReaction.html in the process catalog? There's a warning on that webpage saying that it should not be applied for projectile nuclei with A > 12 unless the target material has A < 13; is that limitation still applicable in Geant4 version 9.4?

Also, I note in the physics list builder G4IonBinaryCascadePhysics.cc, where G4BinaryLightIonReaction is used (and thereby added into the QBBC physics list - I can't find where it's added in QGSP_BIC), that the GenericIon() has this process registered from 0 to 20 GeV, but nothing is registered above that energy for an inelastic process. However, when I run well above 20 GeV (I'm looking at cosmic-ray heavy ions up to 100 GeV/nuc), I don't get the "no model found" crash in ChooseHadronicInteraction that Stella does. What process is taking over in that physics list for GenericIons at higher energies? (I'm using the physics list from the medical_linac example with macro command "/physic/addPackage QBBC", for definiteness.)

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