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3th Monte Carlo Conference MC2010, Tokyo : Japon (2010)
Recent Improvements in Geant4 Electromagnetic Physics Models and Interfaces
V. Ivanchenko1, J. Apostolakis, A. Bagulya, H.B. Abdelouahed, R. Black, A. Bogdanov, H. Burkhard, S. Chauvie, P. Cirrone, G. Cuttone, G. Depaola, F. Di Rosa, S. Elles2, Z. Francis, V. Grichine, P. Gumplinger, P. Gueye, S. Incerti1, A. Ivanchenko1, J. Jacquemier2, A. Lechner, F. Longo, O. Kadr, N. Karakatsanis, M. Karamitros1, R. Kokoulin, H. Kurashige, M. Maire2, A. Mantero, B. Mascialino, J. Moscicki, L. Pandola, J. Perl, I. Petrovic, A. Ristic-Fira, F. Romano, G. Russo, G. Santin3, A. Schaelicke, T. Toshito, H. Tran, L. Urban, T. Yamashit, C. Zacharatou

An overview of the electromagnetic (EM) physics of the Geant4 toolkit is presented. Two sets of EM models are available: the "Standard" initially focused on high energy physics (HEP) while the "Low-energy" was developed for medical, space and other applications. The "Standard" models provide a faster computation but are less accurate for keV energies, the "Low-energy" models are more CPU time consuming. A common interface to EM physics models has been developed allowing a natural combination of ultra-relativistic, relativistic and low-energy models for the same run providing both precision and CPU performance. Due to this migration additional capabilities become available. The new developments include relativistic models for bremsstrahlung and e+e- pair production, models of multiple and single scattering, hadron/ion ionization, microdosimetry for very low energies and also improvements in existing Geant4 models. In parallel, validation suites and benchmarks have been intensively developed.
1 :  CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
2 :  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
Physique/Physique/Physique Médicale
Geant4 – bremsstrahlung – Monte Carlo – multiple scattering – energy loss