Geant4 User's Guide for Application Developers - Geant4 - CERN

Tracking and Physicshas effect only if the usage of the atomic deexcitation is enabled. A warning message is printed if one tries to enablethe emission of the Auger electrons after having disabled the atomic deexcitation via SetDeexcitationFlag(false).5.2.1.3. Very Low energy Electromagnetic Processes (Geant4-DNAextension)The Geant4 low energy electromagnetic Physics package has been extended down to energies of a few electron-Volts suitable for the simulation of radiation effects in liquid water for applications in microdosimetry at the cellularand sub-cellular level. These developments take place in the framework of the on-going Geant4-DNA project(see the web pages of the Geant4 Low Energy Electromagnetic Physics Working Group).The Geant4-DNA process and model classes apply to electrons, protons, hydrogen, alpha particles and their chargestates.Electron processes and models• Elastic scattering :• process class is G4DNAElastic• two alternative model classes are : G4DNAScreenedRutherfordElasticModel orG4DNAChampionElasticModel• Excitation• process class is G4DNAExcitation• model class is G4DNAEmfietzoglouExcitationModel• Ionisation• process class is G4DNAIonisation• model class is G4DNABornIonisationModelProton processes and models• Excitation• process class is G4DNAExcitation• two complementary model classes are G4DNAMillerGreenExcitationModel (below 500 keV) andG4DNABornExcitationModel (above)• Ionisation• process class is G4DNAIonisation• two complementary model classes are G4DNARuddIonisationModel (below 500 keV) andG4DNABornIonisationModel (above)• Charge decrease• process class is G4DNAChargeDecrease• model class is G4DNADingfelderChargeDecreaseModelHydrogen processes and models• Ionisation• process class is G4DNAIonisation• model class is G4DNARuddIonisationModel• Charge increase• process class is G4DNAChargeIncrease• model class is G4DNADingfelderChargeIncreaseModelHelium (neutral) processes and models• Excitation• process class is G4DNAExcitation• model class is G4DNAMillerGreenExcitationModel• Ionisation• process class is G4DNAIonisation• model class is G4DNARuddIonisationModel155