[1058] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
| 26 | // |
---|
| 27 | // |
---|
| 28 | // =========================================================================== |
---|
| 29 | // GEANT4 class header file |
---|
| 30 | // |
---|
| 31 | // Class: G4IonDEDXScalingICRU73 |
---|
| 32 | // |
---|
| 33 | // Base class: G4VIonDEDXScalingAlgorithm |
---|
| 34 | // |
---|
| 35 | // Author: Anton Lechner (Anton.Lechner@cern.ch) |
---|
| 36 | // |
---|
| 37 | // First implementation: 10. 05. 2009 |
---|
| 38 | // |
---|
[1192] | 39 | // Modifications: 12. 11. 2009 - Moved all decision logic concerning ICRU 73 |
---|
| 40 | // scaling for heavy ions into this class. |
---|
| 41 | // Adapting ScalingFactorEnergy class according |
---|
| 42 | // to changes in base class (AL). |
---|
[1058] | 43 | // |
---|
| 44 | // Class description: |
---|
| 45 | // dE/dx scaling algorithm applied on top of ICRU 73 data (for ions not |
---|
| 46 | // covered by the ICRU 73 report) |
---|
| 47 | // |
---|
| 48 | // Comments: |
---|
| 49 | // |
---|
| 50 | // =========================================================================== |
---|
| 51 | |
---|
| 52 | #ifndef G4IONDEDXSCALINGICRU73_HH |
---|
| 53 | #define G4IONDEDXSCALINGICRU73_HH |
---|
| 54 | |
---|
| 55 | #include "globals.hh" |
---|
| 56 | #include "G4VIonDEDXScalingAlgorithm.hh" |
---|
[1192] | 57 | #include "G4Material.hh" |
---|
| 58 | #include "G4ParticleDefinition.hh" |
---|
[1058] | 59 | #include <vector> |
---|
| 60 | |
---|
| 61 | |
---|
| 62 | class G4IonDEDXScalingICRU73 : public G4VIonDEDXScalingAlgorithm { |
---|
| 63 | |
---|
| 64 | public: |
---|
[1192] | 65 | G4IonDEDXScalingICRU73(G4int minAtomicNumberIon = 19, |
---|
| 66 | G4int maxAtomicNumberIon = 102); |
---|
[1058] | 67 | ~G4IonDEDXScalingICRU73(); |
---|
| 68 | |
---|
| 69 | // Function for scaling the kinetic energy (no scaling by default). |
---|
| 70 | // Returns scaling factor for a given ion. |
---|
| 71 | G4double ScalingFactorEnergy( |
---|
[1192] | 72 | const G4ParticleDefinition* particle, // Projectile (ion) |
---|
| 73 | const G4Material* material); // Target material |
---|
[1058] | 74 | |
---|
| 75 | |
---|
| 76 | // Function for scaling the dE/dx value (no scaling by default). |
---|
| 77 | // Returns scaling factor for a given ion-material couple and |
---|
| 78 | // a given kinetic energy. |
---|
| 79 | G4double ScalingFactorDEDX( |
---|
| 80 | const G4ParticleDefinition* particle, // Projectile (ion) |
---|
| 81 | const G4Material*, // Target material |
---|
| 82 | G4double kineticEnergy); // Kinetic energy |
---|
| 83 | |
---|
| 84 | |
---|
| 85 | // Function for defining a base particle for dE/dx calculation. |
---|
| 86 | // (no base particle by default). Returns atomic number of base |
---|
| 87 | // particle. |
---|
| 88 | G4int AtomicNumberBaseIon( |
---|
| 89 | G4int atomicNumberIon, // Atomic number of ion |
---|
| 90 | const G4Material*); // Target material |
---|
| 91 | |
---|
| 92 | private: |
---|
[1192] | 93 | void UpdateCacheParticle( |
---|
[1058] | 94 | const G4ParticleDefinition* particle); // Projectile (ion) |
---|
| 95 | |
---|
[1192] | 96 | void UpdateCacheMaterial( |
---|
| 97 | const G4Material* material); // Target material |
---|
| 98 | |
---|
| 99 | void CreateReferenceParticles(); |
---|
[1058] | 100 | |
---|
| 101 | G4double EquilibriumCharge( |
---|
| 102 | G4double mass, // Ion mass |
---|
| 103 | G4double charge, // Ion charge |
---|
| 104 | G4double atomicNumberPow, // Power of atomic nmb |
---|
| 105 | G4double kineticEnergy); // Kinetic energy |
---|
| 106 | |
---|
| 107 | // Scaling is only applied for ions with atomic numbers in the range |
---|
| 108 | // defined by the following parameters: |
---|
| 109 | G4int minAtomicNumber; |
---|
| 110 | G4int maxAtomicNumber; |
---|
| 111 | |
---|
[1192] | 112 | // Some properties of reference particle (Fe) are stored for faster access |
---|
| 113 | G4ParticleDefinition* referenceFe; |
---|
| 114 | G4int atomicNumberRefFe; |
---|
| 115 | G4int massNumberRefFe; |
---|
| 116 | G4double atomicNumberRefPow23Fe; |
---|
| 117 | G4double chargeRefFe; |
---|
| 118 | G4double massRefFe; |
---|
[1058] | 119 | |
---|
[1192] | 120 | // Some properties of reference particle (Ar) are stored for faster access |
---|
| 121 | G4ParticleDefinition* referenceAr; |
---|
| 122 | G4int atomicNumberRefAr; |
---|
| 123 | G4int massNumberRefAr; |
---|
| 124 | G4double atomicNumberRefPow23Ar; |
---|
| 125 | G4double chargeRefAr; |
---|
| 126 | G4double massRefAr; |
---|
[1058] | 127 | |
---|
[1192] | 128 | // Flag indicating the use of Fe ions as reference particles |
---|
| 129 | G4bool useFe; |
---|
| 130 | |
---|
[1058] | 131 | // Some properties of projectiles are stored for faster access |
---|
| 132 | const G4ParticleDefinition* cacheParticle; |
---|
| 133 | G4int cacheMassNumber; |
---|
| 134 | G4int cacheAtomicNumber; |
---|
| 135 | G4double cacheAtomicNumberPow23; |
---|
| 136 | G4double cacheCharge; |
---|
| 137 | G4double cacheMass; |
---|
[1192] | 138 | |
---|
| 139 | // Material pointer |
---|
| 140 | const G4Material* cacheMaterial; |
---|
[1058] | 141 | }; |
---|
| 142 | |
---|
| 143 | // ########################################################################### |
---|
| 144 | |
---|
[1192] | 145 | inline void G4IonDEDXScalingICRU73::UpdateCacheParticle ( |
---|
| 146 | const G4ParticleDefinition* particle) { // Projectile (ion) |
---|
[1058] | 147 | |
---|
| 148 | if(particle != cacheParticle) { |
---|
| 149 | |
---|
| 150 | cacheParticle = particle; |
---|
| 151 | cacheAtomicNumber = particle -> GetAtomicNumber(); |
---|
| 152 | cacheMassNumber = particle -> GetAtomicMass(); |
---|
| 153 | cacheCharge = particle -> GetPDGCharge(); |
---|
| 154 | cacheMass = particle -> GetPDGMass(); |
---|
[1066] | 155 | cacheAtomicNumberPow23 = std::pow(G4double(cacheAtomicNumber), 2./3.); |
---|
[1192] | 156 | } |
---|
| 157 | } |
---|
[1058] | 158 | |
---|
[1192] | 159 | // ########################################################################### |
---|
| 160 | |
---|
| 161 | inline void G4IonDEDXScalingICRU73::UpdateCacheMaterial ( |
---|
| 162 | const G4Material* material) { // Target material |
---|
| 163 | |
---|
| 164 | if(cacheMaterial != material) { |
---|
| 165 | |
---|
| 166 | cacheMaterial = material; |
---|
| 167 | |
---|
| 168 | useFe = true; |
---|
| 169 | |
---|
| 170 | size_t nmbElements = material -> GetNumberOfElements(); |
---|
| 171 | if( nmbElements > 1 ) useFe = false; |
---|
| 172 | |
---|
| 173 | if( material -> GetName() == "G4_WATER" ) useFe = true; |
---|
[1058] | 174 | } |
---|
| 175 | } |
---|
| 176 | |
---|
| 177 | // ########################################################################### |
---|
| 178 | |
---|
| 179 | inline G4double G4IonDEDXScalingICRU73::EquilibriumCharge( |
---|
| 180 | G4double mass, |
---|
| 181 | G4double charge, |
---|
| 182 | G4double atomicNumberPow, |
---|
| 183 | G4double kineticEnergy) { |
---|
| 184 | |
---|
| 185 | G4double totalEnergy = kineticEnergy + mass; |
---|
| 186 | G4double betaSquared = kineticEnergy * |
---|
| 187 | (totalEnergy + mass) / (totalEnergy * totalEnergy); |
---|
| 188 | |
---|
| 189 | G4double beta = std::sqrt( betaSquared ); |
---|
| 190 | |
---|
| 191 | G4double velOverBohrVel = beta / CLHEP::fine_structure_const; |
---|
| 192 | |
---|
| 193 | G4double q1 = 1.0 - std::exp(-velOverBohrVel / atomicNumberPow); |
---|
| 194 | |
---|
| 195 | return q1 * charge; |
---|
| 196 | } |
---|
| 197 | |
---|
| 198 | // ########################################################################### |
---|
| 199 | |
---|
| 200 | #endif |
---|