Recent Improvements in Geant4 Electromagnetic Physics Models and Interfaces

V. Ivanchenko (1) , 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. Elles (2) , Z. Francis , V. Grichine , P. Gumplinger , P. Gueye , S. Incerti (1) , A. Ivanchenko (1) , J. Jacquemier (2) , A. Lechner , F. Longo , O. Kadr , N. Karakatsanis , M. Karamitros (1) , R. Kokoulin , H. Kurashige , M. Maire (2) , A. Mantero , B. Mascialino , J. Moscicki , L. Pandola , J. Perl , I. Petrovic , A. Ristic-Fira , F. Romano , G. Russo , G. Santin (3) , A. Schaelicke , T. Toshito , H. Tran , L. Urban , T. Yamashit , C. Zacharatou

1 IPCV - Interface Physique et Chimie pour le Vivant
2 LAPP - Laboratoire d'Annecy de Physique des Particules
3 ESTEC - European Space Research and Technology Centre

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.

Mots clés: Geant4; bremsstrahlung; Monte Carlo; multiple scattering; energy loss

Domaines: Physique Médicale [physics.med-ph]

V. Ivanchenko, J. Apostolakis, A. Bagulya, H.B. Abdelouahed, R. Black, et al.. Recent Improvements in Geant4 Electromagnetic Physics Models and Interfaces. 3th Monte Carlo Conference MC2010, Oct 2010, Tokyo, Japan. pp.898-903. ⟨in2p3-00658779⟩