Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 25 // 26 // 27 // ------------------------------------------- 28 // 29 // GEANT4 Class file 30 // 31 // 32 // File name: G4IonYangFluctuationModel 33 // 34 // Author: V.Ivanchenko (Vladimir.Ivanc 35 // 36 // Creation date: 18 August 2000 37 // 38 // Modifications: 39 // 18/08/2000 V.Ivanchenko First implementati 40 // 04/09/2000 V.Ivanchenko Rename fluctuation 41 // 03/10/2000 V.Ivanchenko CodeWizard clean u 42 // 10/05/2001 V.Ivanchenko Clean up againist 43 // 44 // ------------------------------------------- 45 // Class Description: 46 // 47 // The aproximation of additional ion energy l 48 // Q.Yang et al., NIM B61(1991)149-155. 49 // 50 // Class Description: End 51 // 52 // ------------------------------------------- 53 // 54 //....oooOO0OOooo........oooOO0OOooo........oo 55 56 #include "G4IonYangFluctuationModel.hh" 57 58 #include "globals.hh" 59 #include "G4PhysicalConstants.hh" 60 #include "G4SystemOfUnits.hh" 61 #include "G4DynamicParticle.hh" 62 #include "G4ParticleDefinition.hh" 63 #include "G4Material.hh" 64 #include "G4Exp.hh" 65 66 //....oooOO0OOooo........oooOO0OOooo........oo 67 68 G4IonYangFluctuationModel::G4IonYangFluctuatio 69 : G4VLowEnergyModel(name) 70 {;} 71 72 //....oooOO0OOooo........oooOO0OOooo........oo 73 74 G4IonYangFluctuationModel::~G4IonYangFluctuati 75 {;} 76 77 //....oooOO0OOooo........oooOO0OOooo........oo 78 79 G4double G4IonYangFluctuationModel::TheValue(c 80 const G4Material* material) 81 { 82 G4double energy = particle->GetKineticEnergy 83 G4double mass = particle->GetMass() ; 84 G4double charge = (particle->GetCharge())/ep 85 86 G4double q = YangFluctuationModel(material,e 87 88 return q ; 89 } 90 91 //....oooOO0OOooo........oooOO0OOooo........oo 92 93 G4double G4IonYangFluctuationModel::TheValue(c 94 const G4Material* material, 95 G4double kineticEnergy) 96 { 97 G4double mass = aParticle->GetPDGMass() ; 98 G4double charge = (aParticle->GetPDGCharge() 99 100 G4double q = YangFluctuationModel(material,k 101 102 return q ; 103 } 104 105 //....oooOO0OOooo........oooOO0OOooo........oo 106 107 G4double G4IonYangFluctuationModel::HighEnergy 108 const G4Material*) const 109 { 110 return 1.0*TeV ; 111 } 112 113 //....oooOO0OOooo........oooOO0OOooo........oo 114 115 G4double G4IonYangFluctuationModel::LowEnergyL 116 const G4Material* ) const 117 { 118 return 0.0 ; 119 } 120 121 //....oooOO0OOooo........oooOO0OOooo........oo 122 123 G4double G4IonYangFluctuationModel::HighEnergy 124 { 125 return 1.0*TeV ; 126 } 127 128 //....oooOO0OOooo........oooOO0OOooo........oo 129 130 G4double G4IonYangFluctuationModel::LowEnergyL 131 const G4Particle 132 { 133 return 0.0 ; 134 } 135 136 //....oooOO0OOooo........oooOO0OOooo........oo 137 138 G4bool G4IonYangFluctuationModel::IsInCharge(c 139 const G4Material* ) const 140 { 141 return true ; 142 } 143 144 //....oooOO0OOooo........oooOO0OOooo........oo 145 146 G4bool G4IonYangFluctuationModel::IsInCharge(c 147 const G4Material* ) const 148 { 149 return true ; 150 } 151 152 //....oooOO0OOooo........oooOO0OOooo........oo 153 154 G4double G4IonYangFluctuationModel::YangFluctu 155 G4double kineticEnergy, 156 G4double particleMass, 157 G4double charge) const 158 { 159 // The aproximation of energy loss fluctuati 160 // Q.Yang et al., NIM B61(1991)149-155. 161 162 // Reduced energy in MeV/AMU 163 G4double energy = kineticEnergy *amu_c2/(par 164 165 G4int i = 0 ; 166 G4double factor = 1.0 ; 167 168 // The index of set of parameters i = 0 for 169 // 1 for 170 // 2 for 171 // 3 for 172 // 4 for 173 static const G4double b[5][4] = { 174 {0.1014, 0.3700, 0.9642, 3.987}, 175 {0.1955, 0.6941, 2.522, 1.040}, 176 {0.05058, 0.08975, 0.1419, 10.80}, 177 {0.05009, 0.08660, 0.2751, 3.787}, 178 {0.01273, 0.03458, 0.3951, 3.812} 179 } ; 180 181 // protons (hadrons) 182 if(1.5 > charge) { 183 if( kStateGas != material->GetState() ) i 184 185 // ions 186 } else { 187 G4double zeff = (material->GetElectronDens 188 (material->GetTotNbOfAtoms 189 factor = charge * std::pow(charge/zeff, 0. 190 191 if( kStateGas == material->GetState() ) { 192 energy /= (charge * std::sqrt(charge)) ; 193 194 if(1 == (material->GetNumberOfElements() 195 i = 2 ; 196 } else { 197 i = 3 ; 198 } 199 200 } else { 201 energy /= (charge * std::sqrt(charge*zef 202 i = 4 ; 203 } 204 } 205 206 G4double x = b[i][2] * (1.0 - G4Exp( - energ 207 208 G4double q = factor * x * b[i][0] / 209 ((energy - b[i][1])*(energy - b[i 210 211 return q ; 212 } 213