Geant4 Low Energy electromagnetic physics

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Geant4 Low Energy electromagnetic physics

• Petteri Nieminen and Maria Grazia Pia
• ESA/ESTEC and INFN Genova and CERN

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Geant4 Low Energy electrons

• 20 keV electrons, 0.32 and 1.04 mm Al

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Geant4 Low Energy e.m. processes
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Geant4 Low Eenergy e.m. processes

• 1 MeV photons in W

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Geant4 Low Energy e.m. processes, hadrons
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Geant4 Low Energy p, Ziegler and ICRU models
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Geamt4 Low Energy ions
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Geant4 Low Energy ions
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Geant4 Low Energy ions
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Barkas effect
Energy loss in Si
MeV/mm

• The charge dependence of hadron/ion ionisation is
  not negligible at low energies
• No evaluated databases available
• Various models, each one valid in limited energy
  range
• Scarce availability of experimental data
• First implementation of Barkas effect released in
  Geant4
• Work in progress

antiprotons
protons
Ekin (MeV)
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Acknowledgments

• The Geant4 Low Energy Electromagnetic Physics
  Group
• P. Nieminen (ESA)
• M. G. Pia (INFN Genova and CERN)
• V. Lefébure (ESA/CERN)
• S. Chauvie, A. Solano (INFN Torino)
• E. Lamanna (INFN Cosenza)
• R. Gotta, S. Rossi (TERA)
• V. Ivanchenko (Budker Institute, Novosibirsk)