[1058] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // |
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| 28 | // =========================================================================== |
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| 29 | // GEANT4 class header file |
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| 30 | // |
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| 31 | // Class: G4IonDEDXScalingICRU73 |
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| 32 | // |
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| 33 | // Base class: G4VIonDEDXScalingAlgorithm |
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| 34 | // |
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| 35 | // Author: Anton Lechner (Anton.Lechner@cern.ch) |
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| 36 | // |
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| 37 | // First implementation: 10. 05. 2009 |
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| 38 | // |
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| 39 | // Modifications: |
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| 40 | // |
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| 41 | // |
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| 42 | // Class description: |
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| 43 | // dE/dx scaling algorithm applied on top of ICRU 73 data (for ions not |
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| 44 | // covered by the ICRU 73 report) |
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| 45 | // |
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| 46 | // Comments: |
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| 47 | // |
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| 48 | // =========================================================================== |
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| 49 | |
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| 50 | #ifndef G4IONDEDXSCALINGICRU73_HH |
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| 51 | #define G4IONDEDXSCALINGICRU73_HH |
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| 52 | |
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| 53 | #include "globals.hh" |
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| 54 | #include "G4VIonDEDXScalingAlgorithm.hh" |
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| 55 | #include <vector> |
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| 56 | |
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| 57 | |
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| 58 | class G4IonDEDXScalingICRU73 : public G4VIonDEDXScalingAlgorithm { |
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| 59 | |
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| 60 | public: |
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| 61 | G4IonDEDXScalingICRU73(G4int minAtomicNumberIon, |
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| 62 | G4int maxAtomicNumberIon, |
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| 63 | G4int atomicNumberReference, |
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| 64 | G4int massNumberReference); |
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| 65 | ~G4IonDEDXScalingICRU73(); |
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| 66 | |
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| 67 | // Function for scaling the kinetic energy (no scaling by default). |
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| 68 | // Returns scaling factor for a given ion. |
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| 69 | G4double ScalingFactorEnergy( |
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| 70 | const G4ParticleDefinition* particle); // Projectile (ion) |
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| 71 | |
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| 72 | |
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| 73 | // Function for scaling the dE/dx value (no scaling by default). |
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| 74 | // Returns scaling factor for a given ion-material couple and |
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| 75 | // a given kinetic energy. |
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| 76 | G4double ScalingFactorDEDX( |
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| 77 | const G4ParticleDefinition* particle, // Projectile (ion) |
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| 78 | const G4Material*, // Target material |
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| 79 | G4double kineticEnergy); // Kinetic energy |
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| 80 | |
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| 81 | |
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| 82 | // Function for defining a base particle for dE/dx calculation. |
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| 83 | // (no base particle by default). Returns atomic number of base |
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| 84 | // particle. |
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| 85 | G4int AtomicNumberBaseIon( |
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| 86 | G4int atomicNumberIon, // Atomic number of ion |
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| 87 | const G4Material*); // Target material |
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| 88 | |
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| 89 | void AddException(G4int atomicNumberIon); |
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| 90 | |
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| 91 | private: |
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| 92 | void UpdateCache( |
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| 93 | const G4ParticleDefinition* particle); // Projectile (ion) |
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| 94 | |
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| 95 | void CreateReferenceParticle(); |
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| 96 | |
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| 97 | G4double EquilibriumCharge( |
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| 98 | G4double mass, // Ion mass |
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| 99 | G4double charge, // Ion charge |
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| 100 | G4double atomicNumberPow, // Power of atomic nmb |
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| 101 | G4double kineticEnergy); // Kinetic energy |
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| 102 | |
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| 103 | // Scaling is only applied for ions with atomic numbers in the range |
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| 104 | // defined by the following parameters: |
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| 105 | G4int minAtomicNumber; |
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| 106 | G4int maxAtomicNumber; |
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| 107 | |
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| 108 | // Vector with atomic numbers excepted from scaling procedure |
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| 109 | std::vector<G4int> excludedAtomicNumbers; |
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| 110 | G4bool excludedIon; |
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| 111 | |
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| 112 | // Some properties of reference particles are stored for faster access |
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| 113 | G4ParticleDefinition* reference; |
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| 114 | G4int atomicNumberRef; |
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| 115 | G4int massNumberRef; |
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| 116 | G4double atomicNumberRefPow23; |
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| 117 | G4double chargeRef; |
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| 118 | G4double massRef; |
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| 119 | |
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| 120 | // Some properties of projectiles are stored for faster access |
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| 121 | const G4ParticleDefinition* cacheParticle; |
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| 122 | G4int cacheMassNumber; |
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| 123 | G4int cacheAtomicNumber; |
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| 124 | G4double cacheAtomicNumberPow23; |
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| 125 | G4double cacheCharge; |
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| 126 | G4double cacheMass; |
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| 127 | }; |
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| 128 | |
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| 129 | // ########################################################################### |
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| 130 | |
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| 131 | inline void G4IonDEDXScalingICRU73::UpdateCache ( |
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| 132 | const G4ParticleDefinition* particle) { // Projectile (ion) |
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| 133 | |
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| 134 | if(particle != cacheParticle) { |
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| 135 | |
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| 136 | cacheParticle = particle; |
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| 137 | cacheAtomicNumber = particle -> GetAtomicNumber(); |
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| 138 | cacheMassNumber = particle -> GetAtomicMass(); |
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| 139 | cacheCharge = particle -> GetPDGCharge(); |
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| 140 | cacheMass = particle -> GetPDGMass(); |
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| 141 | |
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[1066] | 142 | cacheAtomicNumberPow23 = std::pow(G4double(cacheAtomicNumber), 2./3.); |
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[1058] | 143 | |
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| 144 | excludedIon = false; |
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| 145 | size_t nmb = excludedAtomicNumbers.size(); |
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| 146 | for(size_t i = 0; i < nmb; i++) { |
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| 147 | |
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| 148 | if(cacheAtomicNumber == excludedAtomicNumbers[i]) |
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| 149 | excludedIon = true; |
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| 150 | } |
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| 151 | } |
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| 152 | } |
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| 153 | |
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| 154 | // ########################################################################### |
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| 155 | |
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| 156 | inline G4double G4IonDEDXScalingICRU73::EquilibriumCharge( |
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| 157 | G4double mass, |
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| 158 | G4double charge, |
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| 159 | G4double atomicNumberPow, |
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| 160 | G4double kineticEnergy) { |
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| 161 | |
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| 162 | G4double totalEnergy = kineticEnergy + mass; |
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| 163 | G4double betaSquared = kineticEnergy * |
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| 164 | (totalEnergy + mass) / (totalEnergy * totalEnergy); |
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| 165 | |
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| 166 | G4double beta = std::sqrt( betaSquared ); |
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| 167 | |
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| 168 | G4double velOverBohrVel = beta / CLHEP::fine_structure_const; |
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| 169 | |
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| 170 | G4double q1 = 1.0 - std::exp(-velOverBohrVel / atomicNumberPow); |
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| 171 | |
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| 172 | return q1 * charge; |
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| 173 | } |
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| 174 | |
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| 175 | // ########################################################################### |
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| 176 | |
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| 177 | inline void G4IonDEDXScalingICRU73::AddException(G4int atomicNumber) { |
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| 178 | |
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| 179 | if(atomicNumber >= minAtomicNumber && |
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| 180 | atomicNumber <= maxAtomicNumber) { |
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| 181 | |
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| 182 | excludedAtomicNumbers.push_back( atomicNumber ); |
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| 183 | } |
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| 184 | } |
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| 185 | |
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| 186 | // ########################################################################### |
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| 187 | |
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| 188 | #endif |
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