Progress in Geant4 Electromagnetic Physics Modelling and Validation

[摘要] In this work we report on recent improvements in the electromagnetic (EM) physics models of Geant4 and new validations of EM physics. Improvements have been made in models of the photoelectric effect, Compton scattering, gamma conversion to electron and muon pairs, fluctuations of energy loss, multiple scattering, synchrotron radiation, and high energy positron annihilation. The results of these developments are included in the new Geant4 version 10.1 and in patches to previous versions 9.6 and 10.0 that are planned to be used for production for run-2 at LHC. The Geant4 validation suite for EM physics has been extended and new validation results are shown in this work. In particular, the effect of gamma-nuclear interactions on EM shower shape at LHC energies is discussed.

[发布机构] CERN, Geneva 23; CH1211, Switzerland^1;SLAC National Accelerator Laboratory, Menlo Park; CA; 94025, United States^2;Lebedev Physics Institute, Moscow; 119991, Russia^3;Monash University, School of Physics, Melbourne, Australia^4;University of Tokyo, Tokyo, Japan^5;Universidad de Sevilla, E-Seville, Spain^6;LAPP, Annecy-le-Vieux; 74941, France^7;Centre for Medical Radiation Physics, University of Wollongong, NSW, Australia^8;Université of Bordeaux 1, CNRS/IN2P3, CENBG, Gradignan; 33175, France; (10) Ecoanalytica, Moscow; 119899, Russia; (11) Geant4 Asso. International Ltd, United Kingdom; (12) King Saud University, Riyadh, Saudi Arabia; (13) INFN-LNS, Catania; I-95123, Italy; (14) Varian Medical Systems, Palo Alto; CA; 94304, United States; (15) Nagoya Proton Therapy Center, Nagoya, Japan; (16) Hyogo Ion Beam Medical Center, Tatsuno, Japan^9

[效力级别] 计算机科学 [学科分类] 计算机科学（综合）

[关键词] Electromagnetic physics;Gamma conversion;Muon pairs;Nuclear interaction;Physics models;Validation results