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: G4MuPairProduction 00034 // 00035 // Author: Laszlo Urban 00036 // 00037 // Creation date: 30.05.1998 00038 // 00039 // Modifications: 00040 // 00041 // 04-06-98 in DoIt,secondary production condition: 00042 // range>std::min(threshold,safety) 00043 // 26-10-98 new stuff from R. Kokoulin + cleanup , L.Urban 00044 // 06-05-99 bug fixed , L.Urban 00045 // 10-02-00 modifications+bug fix , new e.m. structure, L.Urban 00046 // 29-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation 00047 // 10-08-01 new methods Store/Retrieve PhysicsTable (mma) 00048 // 17-09-01 migration of Materials to pure STL (mma) 00049 // 20-09-01 (L.Urban) in ComputeMicroscopicCrossSection, remove: 00050 // if(MaxPairEnergy<CutInPairEnergy) MaxPairEnergy=CutInPairEnergy 00051 // 26-09-01 completion of store/retrieve PhysicsTable 00052 // 28-09-01 suppression of theMuonPlus ..etc..data members (mma) 00053 // 29-10-01 all static functions no more inlined (mma) 00054 // 07-11-01 particleMass becomes a local variable (mma) 00055 // 19-08-02 V.Ivanchenko update to new design 00056 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko) 00057 // 26-12-02 Secondary production moved to derived classes (V.Ivanchenko) 00058 // 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko) 00059 // 08-08-03 STD substitute standard (V.Ivanchenko) 00060 // 27-09-03 e+ set to be a secondary particle (V.Ivanchenko) 00061 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko) 00062 // 10-02-04 Add lowestKinEnergy (V.Ivanchenko) 00063 // 17-08-04 Utilise mu+ tables for mu- (V.Ivanchenko) 00064 // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko) 00065 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko) 00066 // 00067 // ------------------------------------------------------------------- 00068 // 00069 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00070 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00071 00072 #include "G4MuPairProduction.hh" 00073 #include "G4SystemOfUnits.hh" 00074 #include "G4Electron.hh" 00075 #include "G4Positron.hh" 00076 #include "G4MuonPlus.hh" 00077 #include "G4MuonMinus.hh" 00078 #include "G4MuPairProductionModel.hh" 00079 #include "G4UniversalFluctuation.hh" 00080 00081 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00082 00083 using namespace std; 00084 00085 G4MuPairProduction::G4MuPairProduction(const G4String& name) 00086 : G4VEnergyLossProcess(name), 00087 theParticle(0), 00088 theBaseParticle(0), 00089 lowestKinEnergy(1.*GeV), 00090 isInitialised(false) 00091 { 00092 SetProcessSubType(fPairProdByCharged); 00093 SetSecondaryParticle(G4Positron::Positron()); 00094 SetIonisation(false); 00095 } 00096 00097 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00098 00099 G4MuPairProduction::~G4MuPairProduction() 00100 {} 00101 00102 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00103 00104 G4bool G4MuPairProduction::IsApplicable(const G4ParticleDefinition& p) 00105 { 00106 return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0*MeV); 00107 } 00108 00109 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00110 00111 G4double G4MuPairProduction::MinPrimaryEnergy(const G4ParticleDefinition*, 00112 const G4Material*, 00113 G4double) 00114 { 00115 return lowestKinEnergy; 00116 } 00117 00118 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00119 00120 void G4MuPairProduction::InitialiseEnergyLossProcess( 00121 const G4ParticleDefinition* part, 00122 const G4ParticleDefinition*) 00123 { 00124 if (!isInitialised) { 00125 isInitialised = true; 00126 00127 theParticle = part; 00128 00129 if (!EmModel()) { SetEmModel(new G4MuPairProductionModel()); } 00130 00131 G4VEmFluctuationModel* fm = 0; 00132 EmModel()->SetLowEnergyLimit(MinKinEnergy()); 00133 EmModel()->SetHighEnergyLimit(MaxKinEnergy()); 00134 AddEmModel(1, EmModel(), fm); 00135 } 00136 } 00137 00138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00139 00140 void G4MuPairProduction::PrintInfo() 00141 {} 00142 00143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... 00144 00145 00146 00147