00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // $Id$ 00027 // 00028 // ------------------------------------------------------------------- 00029 // 00030 // GEANT4 Class file 00031 // 00032 // 00033 // File name: G4hIonisation 00034 // 00035 // Author: Laszlo Urban 00036 // 00037 // Creation date: 30.05.1997 00038 // 00039 // Modifications: 00040 // 00041 // corrected by L.Urban on 24/09/97 00042 // several bugs corrected by L.Urban on 13/01/98 00043 // 07-04-98 remove 'tracking cut' of the ionizing particle, mma 00044 // 22-10-98 cleanup L.Urban 00045 // 02-02-99 bugs fixed , L.Urban 00046 // 29-07-99 correction in BuildLossTable for low energy, L.Urban 00047 // 10-02-00 modifications , new e.m. structure, L.Urban 00048 // 10-08-00 V.Ivanchenko change BuildLambdaTable, in order to 00049 // simulate energy losses of ions; correction to 00050 // cross section for particles with spin 1 is inserted as well 00051 // 28-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation 00052 // 10-08-01 new methods Store/Retrieve PhysicsTable (mma) 00053 // 14-08-01 new function ComputeRestrictedMeandEdx() + 'cleanup' (mma) 00054 // 29-08-01 PostStepDoIt: correction for spin 1/2 (instead of 1) (mma) 00055 // 17-09-01 migration of Materials to pure STL (mma) 00056 // 25-09-01 completion of RetrievePhysicsTable() (mma) 00057 // 29-10-01 all static functions no more inlined 00058 // 08-11-01 Charge renamed zparticle; added to the dedx 00059 // 27-03-02 Bug fix in scaling of lambda table (V.Ivanchenko) 00060 // 09-04-02 Update calculation of tables for GenericIons (V.Ivanchenko) 00061 // 30-04-02 V.Ivanchenko update to new design 00062 // 04-12-02 Add verbose level definition (VI) 00063 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko) 00064 // 26-12-02 Secondary production moved to derived classes (V.Ivanchenko) 00065 // 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko) 00066 // 23-05-03 Define default integral + BohrFluctuations (V.Ivanchenko) 00067 // 03-06-03 Fix initialisation problem for STD ionisation (V.Ivanchenko) 00068 // 04-08-03 Set integral=false to be default (V.Ivanchenko) 00069 // 08-08-03 STD substitute standard (V.Ivanchenko) 00070 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko) 00071 // 27-05-04 Set integral to be a default regime (V.Ivanchenko) 00072 // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko) 00073 // 24-03-05 Optimize internal interfaces (V.Ivantchenko) 00074 // 12-08-05 SetStepLimits(0.2, 0.1*mm) (mma) 00075 // 10-01-06 SetStepLimits -> SetStepFunction (V.Ivanchenko) 00076 // 26-05-06 scale negative particles from pi- and pbar, 00077 // positive from pi+ and p (VI) 00078 // 14-01-07 use SetEmModel() and SetFluctModel() from G4VEnergyLossProcess (mma) 00079 // 12-09-08 Removed CorrectionsAlongStep (VI) 00080 // 27-05-10 Added G4ICRU73QOModel for anti-protons (VI) 00081 // 00082 // ------------------------------------------------------------------- 00083 // 00084 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00085 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00086 00087 #include "G4hIonisation.hh" 00088 #include "G4PhysicalConstants.hh" 00089 #include "G4SystemOfUnits.hh" 00090 #include "G4Electron.hh" 00091 #include "G4Proton.hh" 00092 #include "G4AntiProton.hh" 00093 #include "G4BraggModel.hh" 00094 #include "G4BetheBlochModel.hh" 00095 #include "G4IonFluctuations.hh" 00096 #include "G4UniversalFluctuation.hh" 00097 #include "G4BohrFluctuations.hh" 00098 #include "G4UnitsTable.hh" 00099 #include "G4PionPlus.hh" 00100 #include "G4PionMinus.hh" 00101 #include "G4KaonPlus.hh" 00102 #include "G4KaonMinus.hh" 00103 #include "G4ICRU73QOModel.hh" 00104 00105 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00106 00107 using namespace std; 00108 00109 G4hIonisation::G4hIonisation(const G4String& name) 00110 : G4VEnergyLossProcess(name), 00111 isInitialised(false) 00112 { 00113 SetStepFunction(0.2, 0.1*mm); 00114 SetProcessSubType(fIonisation); 00115 SetSecondaryParticle(G4Electron::Electron()); 00116 mass = 0.0; 00117 ratio = 0.0; 00118 eth = 2*MeV; 00119 } 00120 00121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00122 00123 G4hIonisation::~G4hIonisation() 00124 {} 00125 00126 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00127 00128 G4bool G4hIonisation::IsApplicable(const G4ParticleDefinition& p) 00129 { 00130 return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0*MeV && 00131 !p.IsShortLived()); 00132 } 00133 00134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00135 00136 G4double G4hIonisation::MinPrimaryEnergy(const G4ParticleDefinition*, 00137 const G4Material*, 00138 G4double cut) 00139 { 00140 G4double x = 0.5*cut/electron_mass_c2; 00141 G4double gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio)); 00142 return mass*(gam - 1.0); 00143 } 00144 00145 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00146 00147 void G4hIonisation::InitialiseEnergyLossProcess( 00148 const G4ParticleDefinition* part, 00149 const G4ParticleDefinition* bpart) 00150 { 00151 if(!isInitialised) { 00152 00153 const G4ParticleDefinition* theBaseParticle = 0; 00154 G4String pname = part->GetParticleName(); 00155 G4double q = part->GetPDGCharge(); 00156 00157 // standard base particles 00158 if(part == bpart || pname == "proton" || 00159 pname == "anti_proton" || 00160 pname == "pi+" || pname == "pi-" || 00161 pname == "kaon+" || pname == "kaon-") 00162 { 00163 theBaseParticle = 0; 00164 } 00165 // select base particle 00166 else if(bpart == 0) { 00167 00168 if(part->GetPDGSpin() == 0.0) { 00169 if(q > 0.0) { theBaseParticle = G4KaonPlus::KaonPlus(); } 00170 else { theBaseParticle = G4KaonMinus::KaonMinus(); } 00171 } else { 00172 if(q > 0.0) { theBaseParticle = G4Proton::Proton(); } 00173 else { theBaseParticle = G4AntiProton::AntiProton(); } 00174 } 00175 00176 // base particle defined by interface 00177 } else { 00178 theBaseParticle = bpart; 00179 } 00180 SetBaseParticle(theBaseParticle); 00181 00182 mass = part->GetPDGMass(); 00183 ratio = electron_mass_c2/mass; 00184 eth = 2.0*MeV*mass/proton_mass_c2; 00185 00186 if (!EmModel(1)) { 00187 if(q > 0.0) { SetEmModel(new G4BraggModel(),1); } 00188 else { SetEmModel(new G4ICRU73QOModel(),1); } 00189 } 00190 EmModel(1)->SetLowEnergyLimit(MinKinEnergy()); 00191 00192 // model limit defined for protons 00193 //eth = (EmModel(1)->HighEnergyLimit())*mass/proton_mass_c2; 00194 EmModel(1)->SetHighEnergyLimit(eth); 00195 AddEmModel(1, EmModel(1), new G4IonFluctuations()); 00196 00197 if (!FluctModel()) { SetFluctModel(new G4UniversalFluctuation()); } 00198 00199 if (!EmModel(2)) { SetEmModel(new G4BetheBlochModel(),2); } 00200 EmModel(2)->SetLowEnergyLimit(eth); 00201 EmModel(2)->SetHighEnergyLimit(MaxKinEnergy()); 00202 AddEmModel(2, EmModel(2), FluctModel()); 00203 00204 isInitialised = true; 00205 } 00206 } 00207 00208 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00209 00210 void G4hIonisation::PrintInfo() 00211 {} 00212 00213 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....