[1350] | 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 | // G4hImpactIonisation |
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| 29 | // |
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| 30 | // $Id: G4hImpactIonisation.hh,v 1.2 2010/11/19 17:16:09 pia Exp $ |
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| 31 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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| 32 | // |
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| 33 | // Author: Maria Grazia Pia (MariaGrazia.Pia@ge.infn.it) |
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| 34 | // |
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| 35 | // 08 Sep 2008 - MGP - Created (initially based on G4hLowEnergyIonisation) |
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| 36 | // Added PIXE capabilities |
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| 37 | // Partial clean-up of the implementation (more needed) |
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| 38 | // Calculation of MicroscopicCrossSection delegated to specialised class |
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| 39 | // |
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| 40 | // ------------------------------------------------------------ |
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| 41 | |
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| 42 | // Class Description: |
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| 43 | // Impact Ionisation process of charged hadrons and ions |
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| 44 | // Initially based on G4hLowEnergyIonisation, to be subject to redesign |
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| 45 | // and further evolution of physics capabilities |
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| 46 | // |
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| 47 | // The physics model of G4hLowEnergyIonisation is described in |
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| 48 | // CERN-OPEN-99-121 and CERN-OPEN-99-300. |
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| 49 | // |
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| 50 | // Documentation available in: |
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| 51 | // M.G. Pia et al., PIXE Simulation With Geant4, |
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| 52 | // IEEE Trans. Nucl. Sci., vol. 56, no. 6, pp. 3614-3649, Dec. 2009. |
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| 53 | |
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| 54 | // ------------------------------------------------------------ |
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| 55 | |
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| 56 | #ifndef G4HIMPACTIONISATION |
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| 57 | #define G4HIMPACTIONISATION 1 |
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| 58 | |
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| 59 | #include "globals.hh" |
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| 60 | #include "G4hRDEnergyLoss.hh" |
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| 61 | #include "G4DataVector.hh" |
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| 62 | #include "G4AtomicDeexcitation.hh" |
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| 63 | #include "G4PixeCrossSectionHandler.hh" |
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| 64 | |
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| 65 | #include <map> |
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| 66 | |
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| 67 | class G4VLowEnergyModel; |
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| 68 | class G4VParticleChange; |
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| 69 | class G4ParticleDefinition; |
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| 70 | class G4PhysicsTable; |
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| 71 | class G4MaterialCutsCouple; |
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| 72 | class G4Track; |
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| 73 | class G4Step; |
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| 74 | |
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| 75 | class G4hImpactIonisation : public G4hRDEnergyLoss |
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| 76 | { |
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| 77 | public: // With description |
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| 78 | |
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| 79 | G4hImpactIonisation(const G4String& processName = "hImpactIoni"); |
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| 80 | // The ionisation process for hadrons/ions to be include in the |
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| 81 | // UserPhysicsList |
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| 82 | |
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| 83 | ~G4hImpactIonisation(); |
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| 84 | // Destructor |
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| 85 | |
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| 86 | G4bool IsApplicable(const G4ParticleDefinition&); |
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| 87 | // True for all charged hadrons/ions |
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| 88 | |
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| 89 | void BuildPhysicsTable(const G4ParticleDefinition& aParticleType) ; |
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| 90 | // Build physics table during initialisation |
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| 91 | |
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| 92 | G4double GetMeanFreePath(const G4Track& track, |
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| 93 | G4double previousStepSize, |
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| 94 | enum G4ForceCondition* condition ); |
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| 95 | // Return MeanFreePath until delta-electron production |
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| 96 | |
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| 97 | void PrintInfoDefinition() const; |
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| 98 | // Print out of the class parameters |
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| 99 | |
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| 100 | void SetHighEnergyForProtonParametrisation(G4double energy) {protonHighEnergy = energy;} ; |
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| 101 | // Definition of the boundary proton energy. For higher energies |
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| 102 | // Bethe-Bloch formula is used, for lower energies a parametrisation |
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| 103 | // of the energy losses is performed. Default is 2 MeV. |
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| 104 | |
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| 105 | void SetLowEnergyForProtonParametrisation(G4double energy) {protonLowEnergy = energy;} ; |
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| 106 | // Set of the boundary proton energy. For lower energies |
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| 107 | // the Free Electron Gas model is used for the energy losses. |
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| 108 | // Default is 1 keV. |
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| 109 | |
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| 110 | void SetHighEnergyForAntiProtonParametrisation(G4double energy) {antiprotonHighEnergy = energy;} ; |
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| 111 | // Set of the boundary antiproton energy. For higher energies |
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| 112 | // Bethe-Bloch formula is used, for lower energies parametrisation |
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| 113 | // of the energy losses is performed. Default is 2 MeV. |
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| 114 | |
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| 115 | void SetLowEnergyForAntiProtonParametrisation(G4double energy) {antiprotonLowEnergy = energy;} ; |
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| 116 | // Set of the boundary antiproton energy. For lower energies |
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| 117 | // the Free Electron Gas model is used for the energy losses. |
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| 118 | // Default is 1 keV. |
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| 119 | |
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| 120 | G4double GetContinuousStepLimit(const G4Track& track, |
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| 121 | G4double previousStepSize, |
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| 122 | G4double currentMinimumStep, |
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| 123 | G4double& currentSafety); |
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| 124 | // Calculation of the step limit due to ionisation losses |
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| 125 | |
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| 126 | void SetElectronicStoppingPowerModel(const G4ParticleDefinition* aParticle, |
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| 127 | const G4String& dedxTable); |
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| 128 | // This method defines the electron ionisation parametrisation method |
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| 129 | // via the name of the table. Default is "ICRU_49p". |
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| 130 | |
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| 131 | void SetNuclearStoppingPowerModel(const G4String& dedxTable) |
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| 132 | {theNuclearTable = dedxTable; SetNuclearStoppingOn();}; |
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| 133 | // This method defines the nuclear ionisation parametrisation method |
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| 134 | // via the name of the table. Default is "ICRU_49". |
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| 135 | |
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| 136 | // ---- MGP ---- The following design of On/Off is nonsense; to be modified |
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| 137 | // in a following design iteration |
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| 138 | |
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| 139 | void SetNuclearStoppingOn() {nStopping = true;}; |
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| 140 | // This method switch on calculation of the nuclear stopping power. |
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| 141 | |
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| 142 | void SetNuclearStoppingOff() {nStopping = false;}; |
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| 143 | // This method switch off calculation of the nuclear stopping power. |
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| 144 | |
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| 145 | void SetBarkasOn() {theBarkas = true;}; |
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| 146 | // This method switch on calculation of the Barkas and Bloch effects. |
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| 147 | |
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| 148 | void SetBarkasOff() {theBarkas = false;}; |
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| 149 | // This method switch off calculation of the Barkas and Bloch effects. |
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| 150 | |
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| 151 | void SetPixe(const G4bool /* val */ ) {pixeIsActive = true;}; |
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| 152 | // This method switches atomic relaxation on/off; currently always on |
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| 153 | |
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| 154 | G4VParticleChange* AlongStepDoIt(const G4Track& trackData , |
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| 155 | const G4Step& stepData ) ; |
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| 156 | // Function to determine total energy deposition on the step |
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| 157 | |
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| 158 | G4VParticleChange* PostStepDoIt(const G4Track& track, |
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| 159 | const G4Step& Step ) ; |
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| 160 | // Simulation of delta-ray production. |
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| 161 | |
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| 162 | G4double ComputeDEDX(const G4ParticleDefinition* aParticle, |
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| 163 | const G4MaterialCutsCouple* couple, |
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| 164 | G4double kineticEnergy); |
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| 165 | // This method returns electronic dE/dx for protons or antiproton |
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| 166 | |
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| 167 | void SetCutForSecondaryPhotons(G4double cut); |
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| 168 | // Set threshold energy for fluorescence |
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| 169 | |
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| 170 | void SetCutForAugerElectrons(G4double cut); |
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| 171 | // Set threshold energy for Auger electron production |
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| 172 | |
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| 173 | void ActivateAugerElectronProduction(G4bool val); |
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| 174 | // Set Auger electron production flag on/off |
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| 175 | |
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| 176 | // Accessors to configure PIXE |
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| 177 | void SetPixeCrossSectionK(const G4String& name) { modelK = name; } |
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| 178 | void SetPixeCrossSectionL(const G4String& name) { modelL = name; } |
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| 179 | void SetPixeCrossSectionM(const G4String& name) { modelM = name; } |
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| 180 | void SetPixeProjectileMinEnergy(G4double energy) { eMinPixe = energy; } |
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| 181 | void SetPixeProjectileMaxEnergy(G4double energy) { eMaxPixe = energy; } |
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| 182 | |
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| 183 | protected: |
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| 184 | |
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| 185 | private: |
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| 186 | |
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| 187 | void InitializeMe(); |
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| 188 | void InitializeParametrisation(); |
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| 189 | void BuildLossTable(const G4ParticleDefinition& aParticleType); |
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| 190 | // void BuildDataForFluorescence(const G4ParticleDefinition& aParticleType); |
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| 191 | void BuildLambdaTable(const G4ParticleDefinition& aParticleType); |
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| 192 | void SetProtonElectronicStoppingPowerModel(const G4String& dedxTable) |
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| 193 | {protonTable = dedxTable ;}; |
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| 194 | // This method defines the ionisation parametrisation method via its name |
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| 195 | |
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| 196 | void SetAntiProtonElectronicStoppingPowerModel(const G4String& dedxTable) |
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| 197 | {antiprotonTable = dedxTable;}; |
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| 198 | |
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| 199 | G4double MicroscopicCrossSection(const G4ParticleDefinition& aParticleType, |
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| 200 | G4double kineticEnergy, |
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| 201 | G4double atomicNumber, |
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| 202 | G4double deltaCutInEnergy) const; |
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| 203 | |
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| 204 | G4double GetConstraints(const G4DynamicParticle* particle, |
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| 205 | const G4MaterialCutsCouple* couple); |
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| 206 | // Function to determine StepLimit |
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| 207 | |
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| 208 | G4double ProtonParametrisedDEDX(const G4MaterialCutsCouple* couple, |
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| 209 | G4double kineticEnergy) const; |
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| 210 | |
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| 211 | G4double AntiProtonParametrisedDEDX(const G4MaterialCutsCouple* couple, |
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| 212 | G4double kineticEnergy) const; |
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| 213 | |
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| 214 | G4double DeltaRaysEnergy(const G4MaterialCutsCouple* couple, |
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| 215 | G4double kineticEnergy, |
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| 216 | G4double particleMass) const; |
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| 217 | // This method returns average energy loss due to delta-rays emission with |
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| 218 | // energy higher than the cut energy for given material. |
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| 219 | |
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| 220 | G4double BarkasTerm(const G4Material* material, |
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| 221 | G4double kineticEnergy) const; |
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| 222 | // Function to compute the Barkas term for protons |
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| 223 | |
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| 224 | G4double BlochTerm(const G4Material* material, |
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| 225 | G4double kineticEnergy, |
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| 226 | G4double cSquare) const; |
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| 227 | // Function to compute the Bloch term for protons |
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| 228 | |
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| 229 | G4double ElectronicLossFluctuation(const G4DynamicParticle* particle, |
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| 230 | const G4MaterialCutsCouple* material, |
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| 231 | G4double meanLoss, |
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| 232 | G4double step) const; |
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| 233 | // Function to sample electronic losses |
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| 234 | |
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| 235 | // hide assignment operator |
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| 236 | G4hImpactIonisation & operator=(const G4hImpactIonisation &right); |
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| 237 | G4hImpactIonisation(const G4hImpactIonisation&); |
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| 238 | |
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| 239 | private: |
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| 240 | // private data members ............................... |
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| 241 | G4VLowEnergyModel* betheBlochModel; |
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| 242 | G4VLowEnergyModel* protonModel; |
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| 243 | G4VLowEnergyModel* antiprotonModel; |
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| 244 | G4VLowEnergyModel* theIonEffChargeModel; |
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| 245 | G4VLowEnergyModel* theNuclearStoppingModel; |
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| 246 | G4VLowEnergyModel* theIonChuFluctuationModel; |
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| 247 | G4VLowEnergyModel* theIonYangFluctuationModel; |
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| 248 | |
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| 249 | // std::map<G4int,G4double,std::less<G4int> > totalCrossSectionMap; |
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| 250 | |
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| 251 | // name of parametrisation table of electron stopping power |
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| 252 | G4String protonTable; |
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| 253 | G4String antiprotonTable; |
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| 254 | G4String theNuclearTable; |
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| 255 | |
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| 256 | // interval of parametrisation of electron stopping power |
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| 257 | G4double protonLowEnergy; |
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| 258 | G4double protonHighEnergy; |
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| 259 | G4double antiprotonLowEnergy; |
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| 260 | G4double antiprotonHighEnergy; |
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| 261 | |
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| 262 | // flag of parametrisation of nucleus stopping power |
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| 263 | G4bool nStopping; |
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| 264 | G4bool theBarkas; |
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| 265 | |
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| 266 | G4DataVector cutForDelta; |
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| 267 | G4DataVector cutForGamma; |
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| 268 | G4double minGammaEnergy; |
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| 269 | G4double minElectronEnergy; |
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| 270 | G4PhysicsTable* theMeanFreePathTable; |
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| 271 | |
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| 272 | const G4double paramStepLimit; // parameter limits the step at low energy |
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| 273 | |
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| 274 | G4double fdEdx; // computed in GetContraints |
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| 275 | G4double fRangeNow ; // |
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| 276 | G4double charge; // |
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| 277 | G4double chargeSquare; // |
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| 278 | G4double initialMass; // mass to calculate Lambda tables |
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| 279 | G4double fBarkas; |
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| 280 | |
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| 281 | G4PixeCrossSectionHandler* pixeCrossSectionHandler; |
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| 282 | G4AtomicDeexcitation atomicDeexcitation; |
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| 283 | G4String modelK; |
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| 284 | G4String modelL; |
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| 285 | G4String modelM; |
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| 286 | G4double eMinPixe; |
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| 287 | G4double eMaxPixe; |
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| 288 | |
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| 289 | G4bool pixeIsActive; |
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| 290 | |
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| 291 | }; |
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| 292 | |
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| 293 | |
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| 294 | inline G4double G4hImpactIonisation::GetContinuousStepLimit(const G4Track& track, |
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| 295 | G4double, |
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| 296 | G4double currentMinimumStep, |
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| 297 | G4double&) |
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| 298 | { |
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| 299 | G4double step = GetConstraints(track.GetDynamicParticle(),track.GetMaterialCutsCouple()) ; |
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| 300 | |
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| 301 | // ---- MGP ---- The following line, taken as is from G4hLowEnergyIonisation, |
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| 302 | // is meaningless: currentMinimumStep is passed by value, |
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| 303 | // therefore any local modification to it has no effect |
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| 304 | |
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| 305 | if ((step > 0.) && (step < currentMinimumStep)) currentMinimumStep = step ; |
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| 306 | |
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| 307 | return step ; |
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| 308 | } |
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| 309 | |
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| 310 | |
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| 311 | inline G4bool G4hImpactIonisation::IsApplicable(const G4ParticleDefinition& particle) |
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| 312 | { |
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| 313 | // ---- MGP ---- Better criterion for applicability to be defined; |
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| 314 | // now hard-coded particle mass > 0.1 * proton_mass |
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| 315 | |
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| 316 | return (particle.GetPDGCharge() != 0.0 && particle.GetPDGMass() > proton_mass_c2*0.1); |
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| 317 | } |
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| 318 | |
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| 319 | #endif |
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| 320 | |
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| 321 | |
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| 322 | |
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| 323 | |
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| 324 | |
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| 326 | |
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| 327 | |
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