[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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[1192] | 26 | // $Id: G4PenelopeBremsstrahlung.cc,v 1.21 2009/06/11 15:47:08 mantero Exp $ |
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[1196] | 27 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[819] | 28 | // |
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| 29 | // -------------------------------------------------------------- |
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| 30 | // |
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| 31 | // File name: G4PenelopeBremsstrahlung |
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| 32 | // |
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| 33 | // Author: Luciano Pandola |
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| 34 | // |
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| 35 | // Creation date: February 2003 |
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| 36 | // |
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| 37 | // Modifications: |
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| 38 | // 24.04.2003 V.Ivanchenko - Cut per region mfpt |
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| 39 | // 20.05.2003 MGP - Removed compilation warnings |
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| 40 | // Restored NotForced in GetMeanFreePath |
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| 41 | // 23.05.2003 MGP - Removed memory leak (fix in destructor) |
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| 42 | // 07.11.2003 L.Pandola - Bug fixed in LoadAngularData() |
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| 43 | // 11.11.2003 L.Pandola - Code review: use std::map for angular data |
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| 44 | // 01.06.2004 L.Pandola - StopButAlive for positrons on PostStepDoIt |
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| 45 | // |
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| 46 | //---------------------------------------------------------------- |
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| 47 | |
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| 48 | #include "G4PenelopeBremsstrahlung.hh" |
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| 49 | #include "G4PenelopeBremsstrahlungContinuous.hh" |
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| 50 | #include "G4eBremsstrahlungSpectrum.hh" |
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| 51 | #include "G4BremsstrahlungCrossSectionHandler.hh" |
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| 52 | #include "G4VDataSetAlgorithm.hh" |
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| 53 | #include "G4LogLogInterpolation.hh" |
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| 54 | #include "G4VEMDataSet.hh" |
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| 55 | #include "G4EnergyLossTables.hh" |
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| 56 | #include "G4UnitsTable.hh" |
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| 57 | #include "G4Electron.hh" |
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| 58 | #include "G4Gamma.hh" |
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| 59 | #include "G4MaterialCutsCouple.hh" |
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| 60 | #include "G4DataVector.hh" |
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| 61 | #include "G4ProductionCutsTable.hh" |
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| 62 | #include "G4ProcessManager.hh" |
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| 63 | |
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| 64 | G4PenelopeBremsstrahlung::G4PenelopeBremsstrahlung(const G4String& nam) |
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| 65 | : G4eLowEnergyLoss(nam), |
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| 66 | crossSectionHandler(0), |
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| 67 | theMeanFreePath(0), |
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| 68 | energySpectrum(0) |
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| 69 | { |
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| 70 | angularData = new std::map<G4int,G4PenelopeBremsstrahlungAngular*>; |
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| 71 | cutForPhotons = 0.; |
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| 72 | verboseLevel = 0; |
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[1055] | 73 | |
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| 74 | G4cout << G4endl; |
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| 75 | G4cout << "*******************************************************************************" << G4endl; |
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| 76 | G4cout << "*******************************************************************************" << G4endl; |
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| 77 | G4cout << " The class G4PenelopeBremsstrahlung is NOT SUPPORTED ANYMORE. " << G4endl; |
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| 78 | G4cout << " It will be REMOVED with the next major release of Geant4. " << G4endl; |
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| 79 | G4cout << " Please consult: https://twiki.cern.ch/twiki/bin/view/Geant4/LoweProcesses" << G4endl; |
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| 80 | G4cout << "*******************************************************************************" << G4endl; |
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| 81 | G4cout << "*******************************************************************************" << G4endl; |
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| 82 | G4cout << G4endl; |
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| 83 | |
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[819] | 84 | } |
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| 85 | |
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| 86 | |
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| 87 | G4PenelopeBremsstrahlung::~G4PenelopeBremsstrahlung() |
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| 88 | { |
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| 89 | delete crossSectionHandler; |
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| 90 | delete energySpectrum; |
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| 91 | delete theMeanFreePath; |
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| 92 | for (G4int Z=1;Z<100;Z++){ |
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| 93 | if (angularData->count(Z)) delete (angularData->find(Z)->second); |
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| 94 | } |
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| 95 | delete angularData; |
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| 96 | } |
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| 97 | |
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| 98 | |
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| 99 | void G4PenelopeBremsstrahlung::BuildPhysicsTable(const G4ParticleDefinition& aParticleType) |
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| 100 | { |
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| 101 | if(verboseLevel > 0) { |
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| 102 | G4cout << "G4PenelopeBremsstrahlung::BuildPhysicsTable start" |
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| 103 | << G4endl; |
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| 104 | } |
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| 105 | |
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| 106 | cutForSecondaryPhotons.clear(); |
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| 107 | LoadAngularData(); |
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| 108 | if(verboseLevel > 0) { |
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| 109 | G4cout << "G4PenelopeBremsstrahlung: Angular data loaded" << G4endl; |
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| 110 | } |
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| 111 | // Create and fill BremsstrahlungParameters once |
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| 112 | if ( energySpectrum != 0 ) delete energySpectrum; |
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| 113 | //grid of reduced energy bins for photons |
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| 114 | |
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| 115 | G4DataVector eBins; |
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| 116 | |
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| 117 | eBins.push_back(1.0e-12); |
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| 118 | eBins.push_back(0.05); |
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| 119 | eBins.push_back(0.075); |
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| 120 | eBins.push_back(0.1); |
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| 121 | eBins.push_back(0.125); |
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| 122 | eBins.push_back(0.15); |
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| 123 | eBins.push_back(0.2); |
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| 124 | eBins.push_back(0.25); |
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| 125 | eBins.push_back(0.3); |
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| 126 | eBins.push_back(0.35); |
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| 127 | eBins.push_back(0.40); |
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| 128 | eBins.push_back(0.45); |
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| 129 | eBins.push_back(0.50); |
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| 130 | eBins.push_back(0.55); |
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| 131 | eBins.push_back(0.60); |
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| 132 | eBins.push_back(0.65); |
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| 133 | eBins.push_back(0.70); |
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| 134 | eBins.push_back(0.75); |
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| 135 | eBins.push_back(0.80); |
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| 136 | eBins.push_back(0.85); |
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| 137 | eBins.push_back(0.90); |
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| 138 | eBins.push_back(0.925); |
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| 139 | eBins.push_back(0.95); |
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| 140 | eBins.push_back(0.97); |
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| 141 | eBins.push_back(0.99); |
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| 142 | eBins.push_back(0.995); |
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| 143 | eBins.push_back(0.999); |
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| 144 | eBins.push_back(0.9995); |
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| 145 | eBins.push_back(0.9999); |
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| 146 | eBins.push_back(0.99995); |
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| 147 | eBins.push_back(0.99999); |
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| 148 | eBins.push_back(1.0); |
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| 149 | |
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| 150 | |
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| 151 | const G4String dataName("/penelope/br-sp-pen.dat"); |
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| 152 | energySpectrum = new G4eBremsstrahlungSpectrum(eBins,dataName); |
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| 153 | |
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| 154 | //the shape of the energy spectrum for positron is the same used for the electrons, |
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| 155 | //as the differential cross section is scaled of a factor f(E,Z) which is independent |
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| 156 | //on the energy of the gamma |
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| 157 | |
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| 158 | if(verboseLevel > 0) { |
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| 159 | G4cout << "G4PenelopeBremsstrahlungSpectrum is initialized" |
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| 160 | << G4endl; |
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| 161 | } |
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| 162 | |
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| 163 | // Create and fill G4CrossSectionHandler once |
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| 164 | |
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| 165 | if( crossSectionHandler != 0 ) delete crossSectionHandler; |
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| 166 | G4VDataSetAlgorithm* interpolation = new G4LogLogInterpolation(); |
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| 167 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
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| 168 | G4double highKineticEnergy = GetUpperBoundEloss(); |
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| 169 | G4int totBin = GetNbinEloss(); |
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| 170 | crossSectionHandler = new G4BremsstrahlungCrossSectionHandler(energySpectrum, interpolation); |
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| 171 | crossSectionHandler->Initialise(0,lowKineticEnergy, highKineticEnergy, totBin); |
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| 172 | if (&aParticleType==G4Electron::Electron()) |
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| 173 | { |
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| 174 | crossSectionHandler->LoadShellData("brem/br-cs-"); |
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| 175 | } |
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| 176 | else |
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| 177 | { |
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| 178 | crossSectionHandler->LoadShellData("penelope/br-cs-pos-"); //cross section for positrons |
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| 179 | } |
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| 180 | |
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| 181 | if (verboseLevel > 0) { |
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| 182 | G4cout << GetProcessName() |
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| 183 | << " is created; Cross section data: " |
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| 184 | << G4endl; |
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| 185 | crossSectionHandler->PrintData(); |
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| 186 | G4cout << "Parameters: " |
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| 187 | << G4endl; |
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| 188 | energySpectrum->PrintData(); |
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| 189 | } |
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| 190 | |
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| 191 | // Build loss table for Bremsstrahlung |
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| 192 | |
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| 193 | BuildLossTable(aParticleType); |
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| 194 | |
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| 195 | if(verboseLevel > 0) { |
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| 196 | G4cout << "The loss table is built" |
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| 197 | << G4endl; |
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| 198 | } |
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| 199 | |
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| 200 | if (&aParticleType==G4Electron::Electron()) { |
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| 201 | |
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| 202 | RecorderOfElectronProcess[CounterOfElectronProcess] = (*this).theLossTable; |
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| 203 | CounterOfElectronProcess++; |
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| 204 | PrintInfoDefinition(); |
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| 205 | |
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| 206 | } else { |
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| 207 | |
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| 208 | RecorderOfPositronProcess[CounterOfPositronProcess] = (*this).theLossTable; |
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| 209 | CounterOfPositronProcess++; |
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| 210 | } |
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| 211 | // Build mean free path data using cut values |
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| 212 | |
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| 213 | if( theMeanFreePath != 0 ) delete theMeanFreePath; |
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| 214 | theMeanFreePath = crossSectionHandler-> |
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| 215 | BuildMeanFreePathForMaterials(&cutForSecondaryPhotons); |
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| 216 | |
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| 217 | if(verboseLevel > 0) { |
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| 218 | G4cout << "The MeanFreePath table is built" |
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| 219 | << G4endl; |
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| 220 | } |
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| 221 | |
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| 222 | // Build common DEDX table for all ionisation processes |
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| 223 | |
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| 224 | BuildDEDXTable(aParticleType); |
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| 225 | |
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| 226 | if(verboseLevel > 0) { |
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| 227 | G4cout << "G4PenelopeBremsstrahlung::BuildPhysicsTable end" |
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| 228 | << G4endl; |
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| 229 | } |
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| 230 | } |
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| 231 | |
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| 232 | |
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| 233 | void G4PenelopeBremsstrahlung::BuildLossTable(const G4ParticleDefinition& aParticleType) |
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| 234 | { |
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| 235 | // Build table for energy loss due to soft brems |
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| 236 | // the tables are built for *MATERIALS* binning is taken from LowEnergyLoss |
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| 237 | G4double lowKineticEnergy = GetLowerBoundEloss(); |
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| 238 | G4double highKineticEnergy = GetUpperBoundEloss(); |
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| 239 | size_t totBin = GetNbinEloss(); |
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| 240 | |
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| 241 | // create table |
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| 242 | |
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| 243 | if (theLossTable) { |
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| 244 | theLossTable->clearAndDestroy(); |
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| 245 | delete theLossTable; |
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| 246 | } |
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| 247 | |
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| 248 | const G4ProductionCutsTable* theCoupleTable= |
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| 249 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 250 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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| 251 | theLossTable = new G4PhysicsTable(numOfCouples); |
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| 252 | |
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| 253 | |
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| 254 | // Clean up the vector of cuts |
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| 255 | cutForSecondaryPhotons.clear(); |
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| 256 | |
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| 257 | // Loop for materials |
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| 258 | for (size_t j=0; j<numOfCouples; j++) { |
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| 259 | |
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| 260 | // create physics vector and fill it |
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| 261 | G4PhysicsLogVector* aVector = new G4PhysicsLogVector(lowKineticEnergy, |
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| 262 | highKineticEnergy, |
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| 263 | totBin); |
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| 264 | |
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| 265 | // get material parameters needed for the energy loss calculation |
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| 266 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
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| 267 | const G4Material* material= couple->GetMaterial(); |
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| 268 | // the cut cannot be below lowest limit |
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| 269 | G4double tCut = (*(theCoupleTable->GetEnergyCutsVector(0)))[j]; |
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| 270 | tCut = std::min(highKineticEnergy, tCut); |
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| 271 | cutForSecondaryPhotons.push_back(tCut); |
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| 272 | |
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| 273 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 274 | size_t NumberOfElements = material->GetNumberOfElements() ; |
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| 275 | const G4double* theAtomicNumDensityVector = |
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| 276 | material->GetAtomicNumDensityVector(); |
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| 277 | if(verboseLevel > 1) { |
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| 278 | G4cout << "Energy loss for material # " << j |
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| 279 | << " tCut(keV)= " << tCut/keV |
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| 280 | << G4endl; |
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| 281 | } |
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| 282 | |
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| 283 | G4DataVector* ionloss = new G4DataVector(); |
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| 284 | for (size_t i = 0; i<totBin; i++) { |
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| 285 | ionloss->push_back(0.0); |
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| 286 | } |
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| 287 | |
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| 288 | const G4String partName = aParticleType.GetParticleName(); |
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| 289 | // loop for elements in the material |
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| 290 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
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| 291 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
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| 292 | G4PenelopeBremsstrahlungContinuous* ContLoss = new G4PenelopeBremsstrahlungContinuous(Z,tCut,GetLowerBoundEloss(), |
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| 293 | GetUpperBoundEloss(), |
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| 294 | partName); |
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| 295 | // the initialization must be repeated for each Z |
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| 296 | // now comes the loop for the kinetic energy values |
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| 297 | for (size_t k = 0; k<totBin; k++) { |
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| 298 | G4double lowEdgeEnergy = aVector->GetLowEdgeEnergy(k); |
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| 299 | // method for calcutation of continuous loss |
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| 300 | (*ionloss)[k] += ContLoss->CalculateStopping(lowEdgeEnergy) * theAtomicNumDensityVector[iel]; |
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| 301 | //va chiamato una volta per ogni energia |
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| 302 | //per ogni energia k, somma su tutti gli elementi del materiale |
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| 303 | } |
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| 304 | delete ContLoss; |
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| 305 | } |
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| 306 | |
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| 307 | for (size_t ibin = 0; ibin<totBin; ibin++) { |
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| 308 | aVector->PutValue(ibin,(*ionloss)[ibin]); //un valore per ogni energia (somma sugli elementi del mate) |
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| 309 | } |
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| 310 | delete ionloss; |
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| 311 | theLossTable->insert(aVector); |
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| 312 | } |
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| 313 | } |
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| 314 | |
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| 315 | |
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| 316 | G4VParticleChange* G4PenelopeBremsstrahlung::PostStepDoIt(const G4Track& track, |
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| 317 | const G4Step& step) |
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| 318 | { |
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| 319 | aParticleChange.Initialize(track); |
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| 320 | |
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| 321 | const G4MaterialCutsCouple* couple = track.GetMaterialCutsCouple(); |
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| 322 | const G4Material* material = couple->GetMaterial(); |
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| 323 | G4double kineticEnergy = track.GetKineticEnergy(); |
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| 324 | G4int index = couple->GetIndex(); |
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| 325 | G4double tCut = cutForSecondaryPhotons[index]; |
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| 326 | |
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| 327 | // Control limits |
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| 328 | if(tCut >= kineticEnergy) |
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| 329 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
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| 330 | |
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| 331 | G4int Z = crossSectionHandler->SelectRandomAtom(couple, kineticEnergy); |
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| 332 | G4double tGamma = energySpectrum->SampleEnergy(Z, tCut, kineticEnergy, kineticEnergy); |
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| 333 | //Check if the Z has been inserted in the map |
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| 334 | if (!(angularData->count(Z))) { |
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| 335 | G4String excep = "Not found the angular data for material " + material->GetName(); |
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| 336 | G4Exception(excep); |
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| 337 | } |
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| 338 | |
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| 339 | //Check if the loaded angular data are right |
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| 340 | //G4cout << "Material Z: " << angularData->find(Z)->second->GetAtomicNumber() << " !!" << G4endl; |
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| 341 | |
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| 342 | // Sample gamma angle (Z - axis along the parent particle). |
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| 343 | G4double dirZ = angularData->find(Z)->second->ExtractCosTheta(kineticEnergy,tGamma); |
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| 344 | G4double totalEnergy = kineticEnergy + electron_mass_c2; |
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| 345 | G4double phi = twopi * G4UniformRand(); |
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| 346 | G4double sinTheta = std::sqrt(1. - dirZ*dirZ); |
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| 347 | G4double dirX = sinTheta*std::cos(phi); |
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| 348 | G4double dirY = sinTheta*std::sin(phi); |
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| 349 | |
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| 350 | G4ThreeVector gammaDirection (dirX, dirY, dirZ); |
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| 351 | G4ThreeVector electronDirection = track.GetMomentumDirection(); |
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| 352 | |
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| 353 | gammaDirection.rotateUz(electronDirection); |
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| 354 | |
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| 355 | // |
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| 356 | // Update the incident particle |
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| 357 | // |
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| 358 | |
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| 359 | G4double finalEnergy = kineticEnergy - tGamma; |
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| 360 | |
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| 361 | // Kinematic problem |
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| 362 | if (finalEnergy < 0.) { |
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| 363 | tGamma += finalEnergy; |
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| 364 | finalEnergy = 0.0; |
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| 365 | } |
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| 366 | |
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| 367 | G4double momentum = std::sqrt((totalEnergy + electron_mass_c2)*kineticEnergy); |
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| 368 | |
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| 369 | G4double finalX = momentum*electronDirection.x() - tGamma*gammaDirection.x(); |
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| 370 | G4double finalY = momentum*electronDirection.y() - tGamma*gammaDirection.y(); |
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| 371 | G4double finalZ = momentum*electronDirection.z() - tGamma*gammaDirection.z(); |
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| 372 | |
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| 373 | aParticleChange.SetNumberOfSecondaries(1); |
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| 374 | G4double norm = 1./std::sqrt(finalX*finalX + finalY*finalY + finalZ*finalZ); |
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| 375 | aParticleChange.ProposeMomentumDirection(finalX*norm, finalY*norm, finalZ*norm); |
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| 376 | |
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| 377 | const G4ParticleDefinition* particle = track.GetDefinition(); |
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| 378 | |
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| 379 | if (finalEnergy > 0.) |
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| 380 | { |
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| 381 | aParticleChange.ProposeEnergy(finalEnergy) ; |
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| 382 | } |
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| 383 | else |
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| 384 | { |
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| 385 | aParticleChange.ProposeEnergy(0.) ; |
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| 386 | if (particle->GetProcessManager()->GetAtRestProcessVector()->size()) |
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| 387 | //In this case there is at least one AtRest process |
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| 388 | { |
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| 389 | aParticleChange.ProposeTrackStatus(fStopButAlive); |
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| 390 | } |
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| 391 | else |
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| 392 | { |
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| 393 | aParticleChange.ProposeTrackStatus(fStopAndKill); |
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| 394 | } |
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| 395 | } |
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| 396 | |
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| 397 | |
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| 398 | // create G4DynamicParticle object for the gamma |
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| 399 | G4DynamicParticle* aGamma= new G4DynamicParticle (G4Gamma::Gamma(), |
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| 400 | gammaDirection, tGamma); |
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| 401 | aParticleChange.AddSecondary(aGamma); |
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| 402 | |
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| 403 | return G4VContinuousDiscreteProcess::PostStepDoIt(track, step); |
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| 404 | } |
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| 405 | |
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| 406 | |
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| 407 | void G4PenelopeBremsstrahlung::PrintInfoDefinition() |
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| 408 | { |
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| 409 | G4String comments = "Total cross sections from EEDL database for electrons."; |
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| 410 | comments += "\n Total cross section for positrons calculated from the electrons"; |
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| 411 | comments += "\n through an empirical scaling function."; |
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| 412 | comments += "\n Gamma energy sampled from a data-driven histogram."; |
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| 413 | comments += "\n Implementation of the continuous dE/dx part."; |
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| 414 | comments += "\n It can be used for electrons and positrons"; |
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| 415 | comments += " in the energy range [250eV,100GeV]."; |
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| 416 | comments += "\n The process must work with G4PenelopeIonisation."; |
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| 417 | |
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| 418 | G4cout << G4endl << GetProcessName() << ": " << comments << G4endl; |
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| 419 | } |
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| 420 | |
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| 421 | G4bool G4PenelopeBremsstrahlung::IsApplicable(const G4ParticleDefinition& particle) |
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| 422 | { |
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| 423 | return ( (&particle == G4Electron::Electron()) || (&particle == G4Positron::Positron()) ); |
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| 424 | } |
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| 425 | |
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| 426 | |
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| 427 | G4double G4PenelopeBremsstrahlung::GetMeanFreePath(const G4Track& track, |
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| 428 | G4double, // previousStepSize |
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| 429 | G4ForceCondition* cond) |
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| 430 | { |
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| 431 | *cond = NotForced; |
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| 432 | G4int index = (track.GetMaterialCutsCouple())->GetIndex(); |
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| 433 | const G4VEMDataSet* data = theMeanFreePath->GetComponent(index); |
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| 434 | G4double meanFreePath = data->FindValue(track.GetKineticEnergy()); |
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| 435 | return meanFreePath; |
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| 436 | } |
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| 437 | |
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| 438 | void G4PenelopeBremsstrahlung::SetCutForLowEnSecPhotons(G4double cut) |
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| 439 | { |
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| 440 | cutForPhotons = cut; |
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| 441 | } |
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| 442 | |
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| 443 | void G4PenelopeBremsstrahlung::LoadAngularData() |
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| 444 | { |
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| 445 | const G4ProductionCutsTable* theCoupleTable= |
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| 446 | G4ProductionCutsTable::GetProductionCutsTable(); |
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| 447 | size_t numOfCouples = theCoupleTable->GetTableSize(); |
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| 448 | angularData->clear(); |
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| 449 | for (size_t j=0; j<numOfCouples; j++) { |
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| 450 | const G4MaterialCutsCouple* couple = theCoupleTable->GetMaterialCutsCouple(j); |
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| 451 | const G4Material* material= couple->GetMaterial(); |
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| 452 | const G4ElementVector* theElementVector = material->GetElementVector(); |
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| 453 | size_t NumberOfElements = material->GetNumberOfElements(); |
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| 454 | //loop for elements in the material |
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| 455 | for (size_t iel=0; iel<NumberOfElements; iel++ ) { |
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| 456 | G4int Z = (G4int)((*theElementVector)[iel]->GetZ()); |
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| 457 | //if the material is not present yet --> insert it in the map |
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| 458 | if (!(angularData->count(Z))) { |
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| 459 | angularData->insert(std::make_pair(Z,new G4PenelopeBremsstrahlungAngular(Z))); |
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| 460 | //G4cout << "Loaded......... Z= " << Z << G4endl; |
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| 461 | } |
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| 462 | } |
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| 463 | } |
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| 464 | } |
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| 465 | |
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