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Heavy Ion progress report

Heavy Ion progress report. Koi, Tatsumi SLAC/SCCS. Outline. Current Capability of Geant4 for Heavy Ions interactions G4BinaryLightIonReaction G4WilsonAbrasionModel New Model based on QMD DPMJET-2.5 Interface Summary. G4BinaryLightIonReaction.

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Heavy Ion progress report

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  1. Heavy Ion progress report Koi, Tatsumi SLAC/SCCS

  2. Outline • Current Capability of Geant4 for Heavy Ions interactions • G4BinaryLightIonReaction • G4WilsonAbrasionModel • New Model based on QMD • DPMJET-2.5 Interface • Summary

  3. G4BinaryLightIonReaction • Extension of Binary Cascade for Ions Interactions • Interactions between participants are neglected • These interactions become important when mass number of nucleus in the system increase.

  4. G4WilsonAbrasionModel • A simplified macroscopic model for nuclear-nuclear interactions based largely on geometric arguments • Energy distributions of secondary nucleons are not well described. Abrasion process Ablation process target nucleus

  5. Quantum Molecular Dynamics Model • QMD is quantum extension of classical molecular-dynamics model. • QMD model is widely used to analyze various aspects of heavy ion reactions. • Including interactions between participants • Our implementation of QMD is base on JQMD (Jaeri QMD) . • JAERI-Data/Code 99-042

  6. G4HadronicInteraction G4QMDReactionModel Mean Field Calculator Ground State Generator Collision and Decay handler Statistic Decay of Excited Nucleus

  7. Preliminary result Data: C. Zeitlin et al., Nuclear Physics A 784 (2007) 341-367.

  8. Preliminary result Data: C. Zeitlin et al., Nuclear Physics A 784 (2007) 341-367.

  9. DPMJET-2.5 Interface • DPMJET treats hadron-nuclear and nuclear-nuclear interactions >5 GeV/nuc, with the upper limited reported to be of order 1000TeV • Two versions currently available, both of which treat nuclear-nuclear interactions: • DPMJET-2.5 (Johannes Ranft) - source code publicly released • DPMJET-3 (Stefan Roesler) - access to source controlled by Roesler • Under the ESA MarsREM contract, QinetiQ is developing an interface with DPMJET-2.5 (G4DPMJET2_5Model) specifically to treat nuclear-nuclear interactions. • Attempting to complete during September (delays due to debugging anomalies in the results).

  10. 12C on C @10 GeV/n

  11. 12C on C @200 GeV/n

  12. Summary • QMD based heavy ions interaction model is under development • Mean field calculator, ground state nucleus generator and elemental collision channels are already developed and under testing. • DPMJET-2.5 Interface is also developing which can treats nuclear-nuclear interactions from 5GeV/nuc to the order of 1000TeV/nuc.

  13. Evaporation Pre- compound Fermi breakup Multifragment Photon Evap Binary cascade Light Ions Wilson Abrasion&Ablation Electromagnetic Dissociation G4(J)QMD DPM-JET interface Rad. Decay Thermal 1 MeV 10 MeV 100 MeV 1 GeV 10 GeV 100 GeV 1 TeV (/n) Ion Models Inventory at Dec07?? at Calor06

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