[819] | 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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[991] | 26 | // $Id: G4BetheBlochModel.hh,v 1.16 2008/10/22 16:00:57 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-02 $ |
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[819] | 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // GEANT4 Class header file |
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| 32 | // |
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| 33 | // |
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| 34 | // File name: G4BetheBlochModel |
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| 35 | // |
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| 36 | // Author: Vladimir Ivanchenko on base of Laszlo Urban code |
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| 37 | // |
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| 38 | // Creation date: 03.01.2002 |
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| 39 | // |
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| 40 | // Modifications: |
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| 41 | // |
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| 42 | // 23-12-02 V.Ivanchenko change interface in order to moveto cut per region |
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| 43 | // 24-01-03 Make models region aware (V.Ivanchenko) |
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| 44 | // 13-02-03 Add name (V.Ivanchenko) |
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| 45 | // 12-11-03 Fix for GenericIons (V.Ivanchenko) |
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| 46 | // 24-03-05 Add G4EmCorrections (V.Ivanchenko) |
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[961] | 47 | // 11-04-05 Major optimisation of internal interfaces (V.Ivanchenko) |
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[819] | 48 | // 11-04-04 Move MaxSecondaryEnergy to models (V.Ivanchenko) |
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| 49 | // 11-02-06 ComputeCrossSectionPerElectron, ComputeCrossSectionPerAtom (mma) |
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[961] | 50 | // 12-08-08 Added methods GetParticleCharge, GetChargeSquareRatio, |
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| 51 | // CorrectionsAlongStep needed for ions(V.Ivanchenko) |
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[819] | 52 | |
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| 53 | // |
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| 54 | // Class Description: |
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| 55 | // |
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| 56 | // Implementation of Bethe-Bloch model of energy loss and |
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| 57 | // delta-electron production by heavy charged particles |
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| 58 | |
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| 59 | // ------------------------------------------------------------------- |
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| 60 | // |
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| 61 | |
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| 62 | #ifndef G4BetheBlochModel_h |
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| 63 | #define G4BetheBlochModel_h 1 |
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| 64 | |
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| 65 | #include "G4VEmModel.hh" |
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| 66 | |
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| 67 | class G4EmCorrections; |
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| 68 | class G4ParticleChangeForLoss; |
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[961] | 69 | class G4NistManager; |
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[819] | 70 | |
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[961] | 71 | |
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[819] | 72 | class G4BetheBlochModel : public G4VEmModel |
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| 73 | { |
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| 74 | |
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| 75 | public: |
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| 76 | |
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| 77 | G4BetheBlochModel(const G4ParticleDefinition* p = 0, |
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| 78 | const G4String& nam = "BetheBloch"); |
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| 79 | |
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| 80 | virtual ~G4BetheBlochModel(); |
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| 81 | |
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| 82 | virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&); |
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| 83 | |
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[991] | 84 | G4double MinEnergyCut(const G4ParticleDefinition*, |
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| 85 | const G4MaterialCutsCouple*); |
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[819] | 86 | |
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| 87 | virtual G4double ComputeCrossSectionPerElectron( |
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| 88 | const G4ParticleDefinition*, |
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| 89 | G4double kineticEnergy, |
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| 90 | G4double cutEnergy, |
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| 91 | G4double maxEnergy); |
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| 92 | |
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| 93 | virtual G4double ComputeCrossSectionPerAtom( |
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| 94 | const G4ParticleDefinition*, |
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| 95 | G4double kineticEnergy, |
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| 96 | G4double Z, G4double A, |
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| 97 | G4double cutEnergy, |
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| 98 | G4double maxEnergy); |
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| 99 | |
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| 100 | virtual G4double CrossSectionPerVolume(const G4Material*, |
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| 101 | const G4ParticleDefinition*, |
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| 102 | G4double kineticEnergy, |
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| 103 | G4double cutEnergy, |
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| 104 | G4double maxEnergy); |
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| 105 | |
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| 106 | virtual G4double ComputeDEDXPerVolume(const G4Material*, |
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| 107 | const G4ParticleDefinition*, |
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| 108 | G4double kineticEnergy, |
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| 109 | G4double cutEnergy); |
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| 110 | |
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[961] | 111 | virtual G4double GetChargeSquareRatio(const G4ParticleDefinition* p, |
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| 112 | const G4Material* mat, |
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| 113 | G4double kineticEnergy); |
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| 114 | |
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| 115 | virtual G4double GetParticleCharge(const G4ParticleDefinition* p, |
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| 116 | const G4Material* mat, |
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| 117 | G4double kineticEnergy); |
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| 118 | |
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| 119 | virtual void CorrectionsAlongStep(const G4MaterialCutsCouple*, |
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| 120 | const G4DynamicParticle*, |
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| 121 | G4double& eloss, |
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| 122 | G4double& niel, |
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| 123 | G4double length); |
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| 124 | |
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[819] | 125 | virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*, |
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| 126 | const G4MaterialCutsCouple*, |
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| 127 | const G4DynamicParticle*, |
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| 128 | G4double tmin, |
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| 129 | G4double maxEnergy); |
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| 130 | |
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| 131 | protected: |
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| 132 | |
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[991] | 133 | G4double MaxSecondaryEnergy(const G4ParticleDefinition*, |
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| 134 | G4double kinEnergy); |
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[819] | 135 | |
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| 136 | private: |
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| 137 | |
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| 138 | void SetParticle(const G4ParticleDefinition* p); |
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| 139 | |
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| 140 | // hide assignment operator |
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| 141 | G4BetheBlochModel & operator=(const G4BetheBlochModel &right); |
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| 142 | G4BetheBlochModel(const G4BetheBlochModel&); |
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| 143 | |
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| 144 | const G4ParticleDefinition* particle; |
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[961] | 145 | const G4Material* currentMaterial; |
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[819] | 146 | G4ParticleDefinition* theElectron; |
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| 147 | G4EmCorrections* corr; |
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| 148 | G4ParticleChangeForLoss* fParticleChange; |
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[961] | 149 | G4NistManager* nist; |
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[819] | 150 | |
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| 151 | G4double mass; |
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| 152 | G4double tlimit; |
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| 153 | G4double spin; |
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[961] | 154 | G4double magMoment2; |
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[819] | 155 | G4double chargeSquare; |
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| 156 | G4double ratio; |
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[961] | 157 | G4double formfact; |
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[819] | 158 | G4double twoln10; |
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| 159 | G4double bg2lim; |
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| 160 | G4double taulim; |
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[961] | 161 | G4double corrFactor; |
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[819] | 162 | G4bool isIon; |
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[961] | 163 | G4bool isInitialised; |
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[819] | 164 | }; |
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| 165 | |
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| 166 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 167 | |
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[991] | 168 | inline G4double G4BetheBlochModel::MaxSecondaryEnergy( |
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| 169 | const G4ParticleDefinition* pd, |
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| 170 | G4double kinEnergy) |
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| 171 | { |
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| 172 | if(isIon) SetParticle(pd); |
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| 173 | G4double tau = kinEnergy/mass; |
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| 174 | G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) / |
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| 175 | (1. + 2.0*(tau + 1.)*ratio + ratio*ratio); |
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| 176 | return std::min(tmax,tlimit); |
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| 177 | } |
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| 178 | |
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| 179 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 180 | |
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[819] | 181 | #endif |
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